var VERSION = '1.10.2';

var _isNaN = root.isNaN,
-    _isFinite = root.isFinite;

var _isNaN = isNaN,
+    _isFinite = isFinite;

var Ctor = function(){};

var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
+var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
+  'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];

function _(obj) {
-  if (obj instanceof _) return obj;
-  if (!(this instanceof _)) return new _(obj);
-  this._wrapped = obj;
-}

var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;

var VERSION = _.VERSION = '1.10.2';

function _(obj) {
+  if (obj instanceof _) return obj;
+  if (!(this instanceof _)) return new _(obj);
+  this._wrapped = obj;
+}
+
+_.VERSION = VERSION;

function optimizeCb(func, context, argCount) {
-  if (context === void 0) return func;
-  switch (argCount == null ? 3 : argCount) {
-    case 1: return function(value) {
-      return func.call(context, value);
-    };

function identity(value) {
+  return value;
+}

    case 3: return function(value, index, collection) {
-      return func.call(context, value, index, collection);
-    };
-    case 4: return function(accumulator, value, index, collection) {
-      return func.call(context, accumulator, value, index, collection);
-    };
-  }
-  return function() {
-    return func.apply(context, arguments);
+            
function tagTester(name) {
+  return function(obj) {
+    return toString.call(obj) === '[object ' + name + ']';
   };
-}
+}
+
+var isFunction = tagTester('Function');

function baseIteratee(value, context, argCount) {
-  if (value == null) return identity;
-  if (isFunction(value)) return optimizeCb(value, context, argCount);
-  if (isObject(value) && !isArray(value)) return matcher(value);
-  return property(value);
-}

var nodelist = root.document && root.document.childNodes;
+if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
+  isFunction = function(obj) {
+    return typeof obj == 'function' || false;
+  };
+}
+
+var isFunction$1 = isFunction;

_.iteratee = iteratee;
-function iteratee(value, context) {
-  return baseIteratee(value, context, Infinity);
+            
function isObject(obj) {
+  var type = typeof obj;
+  return type === 'function' || type === 'object' && !!obj;
 }
             
         
@@ -295,15 +298,18 @@ 
Baseline setup
               

                 ¶
               
-              
The function we actually call internally. It invokes _.iteratee if
-overridden, otherwise baseIteratee.
+              
Internal function that returns an efficient (for current engines) version
+of the passed-in callback, to be repeatedly applied in other Underscore
+functions.
 
             

function restArguments(func, startIndex) {
-  startIndex = startIndex == null ? func.length - 1 : +startIndex;
+            
    case 3: return function(value, index, collection) {
+      return func.call(context, value, index, collection);
+    };
+    case 4: return function(accumulator, value, index, collection) {
+      return func.call(context, accumulator, value, index, collection);
+    };
+  }
   return function() {
-    var length = Math.max(arguments.length - startIndex, 0),
-        rest = Array(length),
-        index = 0;
-    for (; index < length; index++) {
-      rest[index] = arguments[index + startIndex];
-    }
-    switch (startIndex) {
-      case 0: return func.call(this, rest);
-      case 1: return func.call(this, arguments[0], rest);
-      case 2: return func.call(this, arguments[0], arguments[1], rest);
-    }
-    var args = Array(startIndex + 1);
-    for (index = 0; index < startIndex; index++) {
-      args[index] = arguments[index];
-    }
-    args[startIndex] = rest;
-    return func.apply(this, args);
+    return func.apply(context, arguments);
   };
 }
             
@@ -354,37 +345,12 @@ 
Baseline setup
               

                 ¶
               
-              
An internal function for creating a new object that inherits from another.
+              
Is a given value an array?
+Delegates to ECMA5’s native Array.isArray
 
             

var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
-var getLength = shallowProperty('length');
-function isArrayLike(collection) {
-  var length = getLength(collection);
-  return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
+            
function createAssigner(keysFunc, defaults) {
+  return function(obj) {
+    var length = arguments.length;
+    if (defaults) obj = Object(obj);
+    if (length < 2 || obj == null) return obj;
+    for (var index = 1; index < length; index++) {
+      var source = arguments[index],
+          keys = keysFunc(source),
+          l = keys.length;
+      for (var i = 0; i < l; i++) {
+        var key = keys[i];
+        if (!defaults || obj[key] === void 0) obj[key] = source[key];
+      }
+    }
+    return obj;
+  };
+}
+
+function has(obj, path) {
+  return obj != null && hasOwnProperty.call(obj, path);
 }
             
         
@@ -418,10 +396,24 @@ 
Baseline setup
               

                 ¶
               
-              
Collection Functions
+              
collectNonEnumProps used to depend on _.contains, but this led to
+circular imports. emulatedSet is a one-off solution that only works for
+arrays of strings.
 
             

function collectNonEnumProps(obj, keys) {
+  keys = emulatedSet(keys);
+  var nonEnumIdx = nonEnumerableProps.length;
+  var constructor = obj.constructor;
+  var proto = isFunction$1(constructor) && constructor.prototype || ObjProto;

function each(obj, iteratee, context) {
-  iteratee = optimizeCb(iteratee, context);
-  var i, length;
-  if (isArrayLike(obj)) {
-    for (i = 0, length = obj.length; i < length; i++) {
-      iteratee(obj[i], i, obj);
-    }
-  } else {
-    var _keys = keys(obj);
-    for (i = 0, length = _keys.length; i < length; i++) {
-      iteratee(obj[_keys[i]], _keys[i], obj);
+            
  var prop = 'constructor';
+  if (has(obj, prop) && !keys.contains(prop)) keys.push(prop);
+
+  while (nonEnumIdx--) {
+    prop = nonEnumerableProps[nonEnumIdx];
+    if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
+      keys.push(prop);
     }
   }
-  return obj;
 }
             
         
@@ -474,21 +466,16 @@ 
Collection Functions
               

                 ¶
               
-              
Return the results of applying the iteratee to each element.
+              
Retrieve the names of an object’s own properties.
+Delegates to ECMAScript 5‘s native Object.keys.
 
             

function createReduce(dir) {

  if (hasEnumBug) collectNonEnumProps(obj, keys);
+  return keys;
+}

  var reducer = function(obj, iteratee, memo, initial) {
-    var _keys = !isArrayLike(obj) && keys(obj),
-        length = (_keys || obj).length,
-        index = dir > 0 ? 0 : length - 1;
-    if (!initial) {
-      memo = obj[_keys ? _keys[index] : index];
-      index += dir;
-    }
-    for (; index >= 0 && index < length; index += dir) {
-      var currentKey = _keys ? _keys[index] : index;
-      memo = iteratee(memo, obj[currentKey], currentKey, obj);
-    }
-    return memo;
-  };
-
-  return function(obj, iteratee, memo, context) {
-    var initial = arguments.length >= 3;
-    return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
-  };
-}

var extendOwn = createAssigner(keys);

var reduce = createReduce(1);

function isMatch(object, attrs) {
+  var _keys = keys(attrs), length = _keys.length;
+  if (object == null) return !length;
+  var obj = Object(object);
+  for (var i = 0; i < length; i++) {
+    var key = _keys[i];
+    if (attrs[key] !== obj[key] || !(key in obj)) return false;
+  }
+  return true;
+}

var reduceRight = createReduce(-1);

function matcher(attrs) {
+  attrs = extendOwn({}, attrs);
+  return function(obj) {
+    return isMatch(obj, attrs);
+  };
+}
+
+function shallowProperty(key) {
+  return function(obj) {
+    return obj == null ? void 0 : obj[key];
+  };
+}
+
+function deepGet(obj, path) {
+  var length = path.length;
+  for (var i = 0; i < length; i++) {
+    if (obj == null) return void 0;
+    obj = obj[path[i]];
+  }
+  return length ? obj : void 0;
+}

function find(obj, predicate, context) {
-  var keyFinder = isArrayLike(obj) ? findIndex : findKey;
-  var key = keyFinder(obj, predicate, context);
-  if (key !== void 0 && key !== -1) return obj[key];
+            
function property(path) {
+  if (!isArray(path)) {
+    return shallowProperty(path);
+  }
+  return function(obj) {
+    return deepGet(obj, path);
+  };
 }
             
         
@@ -599,17 +602,17 @@ 
Collection Functions
               

                 ¶
               
-              
Return all the elements that pass a truth test.
+              
An internal function to generate callbacks that can be applied to each
+element in a collection, returning the desired result — either identity,
+an arbitrary callback, a property matcher, or a property accessor.
 
             

var invoke = restArguments(function(obj, path, args) {
-  var contextPath, func;
-  if (isFunction(path)) {
-    func = path;
-  } else if (isArray(path)) {
-    contextPath = path.slice(0, -1);
-    path = path[path.length - 1];
-  }
-  return map(obj, function(context) {
-    var method = func;
-    if (!method) {
-      if (contextPath && contextPath.length) {
-        context = deepGet(context, contextPath);
-      }
-      if (context == null) return void 0;
-      method = context[path];
+            
function each(obj, iteratee, context) {
+  iteratee = optimizeCb(iteratee, context);
+  var i, length;
+  if (isArrayLike(obj)) {
+    for (i = 0, length = obj.length; i < length; i++) {
+      iteratee(obj[i], i, obj);
     }
-    return method == null ? method : method.apply(context, args);
-  });
-});
+  } else {
+    var _keys = keys(obj);
+    for (i = 0, length = _keys.length; i < length; i++) {
+      iteratee(obj[_keys[i]], _keys[i], obj);
+    }
+  }
+  return obj;
+}

function pluck(obj, key) {
-  return map(obj, property(key));
+            
function cb(value, context, argCount) {
+  if (_.iteratee !== iteratee) return _.iteratee(value, context);
+  return baseIteratee(value, context, argCount);
 }
             
         
@@ -756,13 +775,20 @@ 
Collection Functions
               

                 ¶
               
-              
Convenience version of a common use case of filter: selecting only objects
-containing specific key:value pairs.
+              
Return the results of applying the iteratee to each element.
 
             

function shuffle(obj) {
-  return sample(obj, Infinity);
-}

var reduceRight = createReduce(-1);

function sample(obj, n, guard) {
-  if (n == null || guard) {
-    if (!isArrayLike(obj)) obj = values(obj);
-    return obj[random(obj.length - 1)];
-  }
-  var sample = isArrayLike(obj) ? clone(obj) : values(obj);
-  var length = getLength(sample);
-  n = Math.max(Math.min(n, length), 0);
-  var last = length - 1;
-  for (var index = 0; index < n; index++) {
-    var rand = random(index, last);
-    var temp = sample[index];
-    sample[index] = sample[rand];
-    sample[rand] = temp;
-  }
-  return sample.slice(0, n);
+            
function createPredicateIndexFinder(dir) {
+  return function(array, predicate, context) {
+    predicate = cb(predicate, context);
+    var length = getLength(array);
+    var index = dir > 0 ? 0 : length - 1;
+    for (; index >= 0 && index < length; index += dir) {
+      if (predicate(array[index], index, array)) return index;
+    }
+    return -1;
+  };
 }
             
         
@@ -917,29 +906,11 @@ 
Collection Functions
               

                 ¶
               
-              
Sort the object’s values by a criterion produced by an iteratee.
+              
Returns the first index on an array-like that passes a predicate test.
 
             

function group(behavior, partition) {
-  return function(obj, iteratee, context) {
-    var result = partition ? [[], []] : {};
-    iteratee = cb(iteratee, context);
-    each(obj, function(value, index) {
-      var key = iteratee(value, index, obj);
-      behavior(result, value, key);
-    });
-    return result;
-  };
+            
function findKey(obj, predicate, context) {
+  predicate = cb(predicate, context);
+  var _keys = keys(obj), key;
+  for (var i = 0, length = _keys.length; i < length; i++) {
+    key = _keys[i];
+    if (predicate(obj[key], key, obj)) return key;
+  }
 }
             
         
@@ -975,14 +943,15 @@ 
Collection Functions
               

                 ¶
               
-              
Groups the object’s values by a criterion. Pass either a string attribute
-to group by, or a function that returns the criterion.
+              
Return the first value which passes a truth test.
 
             

var indexBy = group(function(result, value, key) {
-  result[key] = value;
-});

function filter(obj, predicate, context) {
+  var results = [];
+  predicate = cb(predicate, context);
+  each(obj, function(value, index, list) {
+    if (predicate(value, index, list)) results.push(value);
+  });
+  return results;
+}

var countBy = group(function(result, value, key) {
-  if (_has(result, key)) result[key]++; else result[key] = 1;
-});
-
-var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;

function negate(predicate) {
+  return function() {
+    return !predicate.apply(this, arguments);
+  };
+}

function toArray(obj) {
-  if (!obj) return [];
-  if (isArray(obj)) return slice.call(obj);
-  if (isString(obj)) {

function reject(obj, predicate, context) {
+  return filter(obj, negate(cb(predicate)), context);
+}

    return obj.match(reStrSymbol);
+            
function every(obj, predicate, context) {
+  predicate = cb(predicate, context);
+  var _keys = !isArrayLike(obj) && keys(obj),
+      length = (_keys || obj).length;
+  for (var index = 0; index < length; index++) {
+    var currentKey = _keys ? _keys[index] : index;
+    if (!predicate(obj[currentKey], currentKey, obj)) return false;
   }
-  if (isArrayLike(obj)) return map(obj, identity);
-  return values(obj);
+  return true;
 }
             
         
@@ -1069,13 +1044,19 @@ 
Collection Functions
               

                 ¶
               
-              
Return the number of elements in an object.
+              
Determine if at least one element in the object matches a truth test.
 
             

function isNaN$1(obj) {
+  return isNumber(obj) && _isNaN(obj);
+}

function first(array, n, guard) {
-  if (array == null || array.length < 1) return n == null ? void 0 : [];
-  if (n == null || guard) return array[0];
-  return initial(array, array.length - n);
+            
function createIndexFinder(dir, predicateFind, sortedIndex) {
+  return function(array, item, idx) {
+    var i = 0, length = getLength(array);
+    if (typeof idx == 'number') {
+      if (dir > 0) {
+        i = idx >= 0 ? idx : Math.max(idx + length, i);
+      } else {
+        length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
+      }
+    } else if (sortedIndex && idx && length) {
+      idx = sortedIndex(array, item);
+      return array[idx] === item ? idx : -1;
+    }
+    if (item !== item) {
+      idx = predicateFind(slice.call(array, i, length), isNaN$1);
+      return idx >= 0 ? idx + i : -1;
+    }
+    for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
+      if (array[idx] === item) return idx;
+    }
+    return -1;
+  };
 }
             
         
@@ -1150,15 +1172,14 @@ 
Array Functions
               

                 ¶
               
-              
Returns everything but the last entry of the array. Especially useful on
-the arguments object. Passing n will return all the values in
-the array, excluding the last N.
+              
Return the position of the first occurrence of an item in an array,
+or -1 if the item is not included in the array.
+If the array is large and already in sort order, pass true
+for isSorted to use binary search.
 
             

function last(array, n, guard) {
-  if (array == null || array.length < 1) return n == null ? void 0 : [];
-  if (n == null || guard) return array[array.length - 1];
-  return rest(array, Math.max(0, array.length - n));
-}

function contains(obj, item, fromIndex, guard) {
+  if (!isArrayLike(obj)) obj = values(obj);
+  if (typeof fromIndex != 'number' || guard) fromIndex = 0;
+  return indexOf(obj, item, fromIndex) >= 0;
+}

function rest(array, n, guard) {
-  return slice.call(array, n == null || guard ? 1 : n);
-}

var invoke = restArguments(function(obj, path, args) {
+  var contextPath, func;
+  if (isFunction$1(path)) {
+    func = path;
+  } else if (isArray(path)) {
+    contextPath = path.slice(0, -1);
+    path = path[path.length - 1];
+  }
+  return map(obj, function(context) {
+    var method = func;
+    if (!method) {
+      if (contextPath && contextPath.length) {
+        context = deepGet(context, contextPath);
+      }
+      if (context == null) return void 0;
+      method = context[path];
+    }
+    return method == null ? method : method.apply(context, args);
+  });
+});

function compact(array) {
-  return filter(array, Boolean);
+            
function pluck(obj, key) {
+  return map(obj, property(key));
 }
             
         
@@ -1225,16 +1260,14 @@ 
Array Functions
               

                 ¶
               
-              
Internal implementation of a recursive flatten function.
+              
Convenience version of a common use case of filter: selecting only objects
+containing specific key:value pairs.
 
             

      if (shallow) {
-        var j = 0, len = value.length;
-        while (j < len) output[idx++] = value[j++];
-      } else {
-        _flatten(value, shallow, strict, output);
-        idx = output.length;
-      }
-    } else if (!strict) {
-      output[idx++] = value;
-    }
-  }
-  return output;
+            
function findWhere(obj, attrs) {
+  return find(obj, matcher(attrs));
 }
             
         
@@ -1272,12 +1296,32 @@ 
Array Functions
               

                 ¶
               
-              
Flatten out an array, either recursively (by default), or just one level.
+              
Return the maximum element (or element-based computation).
 
             

var union = restArguments(function(arrays) {
-  return uniq(_flatten(arrays, true, true));
-});

  if (hasEnumBug) collectNonEnumProps(obj, keys);
+  return keys;
+}

function intersection(array) {
-  var result = [];
-  var argsLength = arguments.length;
-  for (var i = 0, length = getLength(array); i < length; i++) {
-    var item = array[i];
-    if (contains(result, item)) continue;
-    var j;
-    for (j = 1; j < argsLength; j++) {
-      if (!contains(arguments[j], item)) break;
-    }
-    if (j === argsLength) result.push(item);
-  }
-  return result;
-}

var extend = createAssigner(allKeys);

var difference = restArguments(function(array, rest) {
-  rest = _flatten(rest, true, true);
-  return filter(array, function(value){
-    return !contains(rest, value);
-  });
-});

function clone(obj) {
+  if (!isObject(obj)) return obj;
+  return isArray(obj) ? obj.slice() : extend({}, obj);
+}

function unzip(array) {
-  var length = array && max(array, getLength).length || 0;
-  var result = Array(length);
-
-  for (var index = 0; index < length; index++) {
-    result[index] = pluck(array, index);
+            
function random(min, max) {
+  if (max == null) {
+    max = min;
+    min = 0;
   }
-  return result;
+  return min + Math.floor(Math.random() * (max - min + 1));
 }
             
         
@@ -1442,12 +1459,30 @@ 
Array Functions
               

                 ¶
               
-              
Zip together multiple lists into a single array – elements that share
-an index go together.
+              
Sample n random values from a collection using the modern version of the
+Fisher-Yates shuffle.
+If n is not specified, returns a single random element.
+The internal guard argument allows it to work with map.
 
             

function object(list, values) {
-  var result = {};
-  for (var i = 0, length = getLength(list); i < length; i++) {
-    if (values) {
-      result[list[i]] = values[i];
-    } else {
-      result[list[i][0]] = list[i][1];
-    }
-  }
-  return result;
+            
function shuffle(obj) {
+  return sample(obj, Infinity);
 }
             
         
@@ -1485,20 +1510,28 @@ 
Array Functions
               

                 ¶
               
-              
Generator function to create the findIndex and findLastIndex functions.
+              
Sort the object’s values by a criterion produced by an iteratee.
 
             

function createIndexFinder(dir, predicateFind, sortedIndex) {
-  return function(array, item, idx) {
-    var i = 0, length = getLength(array);
-    if (typeof idx == 'number') {
-      if (dir > 0) {
-        i = idx >= 0 ? idx : Math.max(idx + length, i);
-      } else {
-        length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
-      }
-    } else if (sortedIndex && idx && length) {
-      idx = sortedIndex(array, item);
-      return array[idx] === item ? idx : -1;
-    }
-    if (item !== item) {
-      idx = predicateFind(slice.call(array, i, length), isNaN);
-      return idx >= 0 ? idx + i : -1;
-    }
-    for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
-      if (array[idx] === item) return idx;
-    }
-    return -1;
-  };
-}

var indexBy = group(function(result, value, key) {
+  result[key] = value;
+});

var indexOf = createIndexFinder(1, findIndex, sortedIndex);
-var lastIndexOf = createIndexFinder(-1, findLastIndex);

var countBy = group(function(result, value, key) {
+  if (has(result, key)) result[key]++; else result[key] = 1;
+});
+
+var isString = tagTester('String');
+
+var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;

function range(start, stop, step) {
-  if (stop == null) {
-    stop = start || 0;
-    start = 0;
-  }
-  if (!step) {
-    step = stop < start ? -1 : 1;
-  }
-
-  var length = Math.max(Math.ceil((stop - start) / step), 0);
-  var range = Array(length);
-
-  for (var idx = 0; idx < length; idx++, start += step) {
-    range[idx] = start;
-  }
-
-  return range;
-}

function toArray(obj) {
+  if (!obj) return [];
+  if (isArray(obj)) return slice.call(obj);
+  if (isString(obj)) {

function chunk(array, count) {
-  if (count == null || count < 1) return [];
-  var result = [];
-  var i = 0, length = array.length;
-  while (i < length) {
-    result.push(slice.call(array, i, i += count));
+            
    return obj.match(reStrSymbol);
   }
-  return result;
+  if (isArrayLike(obj)) return map(obj, identity);
+  return values(obj);
 }
             
         
@@ -1665,10 +1664,15 @@ 
Array Functions
               

                 ¶
               
-              
Function (ahem) Functions
+              
Return the number of elements in an object.
 
             

var partition = group(function(result, value, pass) {
+  result[pass ? 0 : 1].push(value);
+}, true);

function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
-  if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
-  var self = baseCreate(sourceFunc.prototype);
-  var result = sourceFunc.apply(self, args);
-  if (isObject(result)) return result;
-  return self;
+            
function initial(array, n, guard) {
+  return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
 }
             
         
@@ -1712,19 +1719,16 @@ 
Function (ahem) Functions
               

                 ¶
               
-              
Create a function bound to a given object (assigning this, and arguments,
-optionally). Delegates to ECMAScript 5‘s native Function.bind if
-available.
+              
Get the first element of an array. Passing n will return the first N
+values in the array. The guard check allows it to work with map.
 
             

var partial = restArguments(function(func, boundArgs) {
-  var placeholder = partial.placeholder;
-  var bound = function() {
-    var position = 0, length = boundArgs.length;
-    var args = Array(length);
-    for (var i = 0; i < length; i++) {
-      args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
-    }
-    while (position < arguments.length) args.push(arguments[position++]);
-    return executeBound(func, bound, this, this, args);
-  };
-  return bound;
-});
-
-partial.placeholder = _;

function rest(array, n, guard) {
+  return slice.call(array, n == null || guard ? 1 : n);
+}

var bindAll = restArguments(function(obj, _keys) {
-  _keys = _flatten(_keys, false, false);
-  var index = _keys.length;
-  if (index < 1) throw new Error('bindAll must be passed function names');
-  while (index--) {
-    var key = _keys[index];
-    obj[key] = bind(obj[key], obj);
-  }
-});

function last(array, n, guard) {
+  if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+  if (n == null || guard) return array[array.length - 1];
+  return rest(array, Math.max(0, array.length - n));
+}

function memoize(func, hasher) {
-  var memoize = function(key) {
-    var cache = memoize.cache;
-    var address = '' + (hasher ? hasher.apply(this, arguments) : key);
-    if (!_has(cache, address)) cache[address] = func.apply(this, arguments);
-    return cache[address];
-  };
-  memoize.cache = {};
-  return memoize;
-}

function compact(array) {
+  return filter(array, Boolean);
+}
+
+var isArguments = tagTester('Arguments');

var delay = restArguments(function(func, wait, args) {
-  return setTimeout(function() {
-    return func.apply(null, args);
-  }, wait);
-});

(function() {
+  if (!isArguments(arguments)) {
+    isArguments = function(obj) {
+      return has(obj, 'callee');
+    };
+  }
+}());
+
+var isArguments$1 = isArguments;

var defer = partial(delay, _, 1);

function flatten(input, shallow, strict, output) {
+  output = output || [];
+  var idx = output.length;
+  for (var i = 0, length = getLength(input); i < length; i++) {
+    var value = input[i];
+    if (isArrayLike(value) && (isArray(value) || isArguments$1(value))) {

function throttle(func, wait, options) {
-  var timeout, context, args, result;
-  var previous = 0;
-  if (!options) options = {};
-
-  var later = function() {
-    previous = options.leading === false ? 0 : now();
-    timeout = null;
-    result = func.apply(context, args);
-    if (!timeout) context = args = null;
-  };
-
-  var throttled = function() {
-    var _now = now();
-    if (!previous && options.leading === false) previous = _now;
-    var remaining = wait - (_now - previous);
-    context = this;
-    args = arguments;
-    if (remaining <= 0 || remaining > wait) {
-      if (timeout) {
-        clearTimeout(timeout);
-        timeout = null;
+            
      if (shallow) {
+        var j = 0, len = value.length;
+        while (j < len) output[idx++] = value[j++];
+      } else {
+        flatten(value, shallow, strict, output);
+        idx = output.length;
       }
-      previous = _now;
-      result = func.apply(context, args);
-      if (!timeout) context = args = null;
-    } else if (!timeout && options.trailing !== false) {
-      timeout = setTimeout(later, remaining);
+    } else if (!strict) {
+      output[idx++] = value;
     }
-    return result;
-  };
-
-  throttled.cancel = function() {
-    clearTimeout(timeout);
-    previous = 0;
-    timeout = context = args = null;
-  };
-
-  return throttled;
+  }
+  return output;
 }
             
         
@@ -1910,40 +1868,12 @@ 
Function (ahem) Functions
               

                 ¶
               
-              
Returns a function, that, as long as it continues to be invoked, will not
-be triggered. The function will be called after it stops being called for
-N milliseconds. If immediate is passed, trigger the function on the
-leading edge, instead of the trailing.
+              
Flatten out an array, either recursively (by default), or just one level.
 
             

function compose() {
-  var args = arguments;
-  var start = args.length - 1;
-  return function() {
-    var i = start;
-    var result = args[start].apply(this, arguments);
-    while (i--) result = args[i].call(this, result);
-    return result;
-  };
+            
function isBoolean(obj) {
+  return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
 }
             
         
@@ -2018,16 +1940,39 @@ 
Function (ahem) Functions
               

                 ¶
               
-              
Returns a function that will only be executed on and after the Nth call.
+              
Produce a duplicate-free version of the array. If the array has already
+been sorted, you have the option of using a faster algorithm.
+The faster algorithm will not work with an iteratee if the iteratee
+is not a one-to-one function, so providing an iteratee will disable
+the faster algorithm.
 
             

function unzip(array) {
+  var length = array && max(array, getLength).length || 0;
+  var result = Array(length);
+
+  for (var index = 0; index < length; index++) {
+    result[index] = pluck(array, index);
+  }
+  return result;
+}

var zip = restArguments(unzip);

var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
-var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
-  'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
-
-function collectNonEnumProps(obj, _keys) {
-  var nonEnumIdx = nonEnumerableProps.length;
-  var constructor = obj.constructor;
-  var proto = isFunction(constructor) && constructor.prototype || ObjProto;

function object(list, values) {
+  var result = {};
+  for (var i = 0, length = getLength(list); i < length; i++) {
+    if (values) {
+      result[list[i]] = values[i];
+    } else {
+      result[list[i][0]] = list[i][1];
+    }
+  }
+  return result;
+}

  var prop = 'constructor';
-  if (_has(obj, prop) && !contains(_keys, prop)) _keys.push(prop);
-
-  while (nonEnumIdx--) {
-    prop = nonEnumerableProps[nonEnumIdx];
-    if (prop in obj && obj[prop] !== proto[prop] && !contains(_keys, prop)) {
-      _keys.push(prop);
-    }
-  }
-}

var findLastIndex = createPredicateIndexFinder(-1);

function keys(obj) {
-  if (!isObject(obj)) return [];
-  if (nativeKeys) return nativeKeys(obj);
-  var _keys = [];
-  for (var key in obj) if (_has(obj, key)) _keys.push(key);

var lastIndexOf = createIndexFinder(-1, findLastIndex);

  if (hasEnumBug) collectNonEnumProps(obj, _keys);
-  return _keys;
+            
function range(start, stop, step) {
+  if (stop == null) {
+    stop = start || 0;
+    start = 0;
+  }
+  if (!step) {
+    step = stop < start ? -1 : 1;
+  }
+
+  var length = Math.max(Math.ceil((stop - start) / step), 0);
+  var range = Array(length);
+
+  for (var idx = 0; idx < length; idx++, start += step) {
+    range[idx] = start;
+  }
+
+  return range;
 }
             
         
@@ -2187,14 +2163,20 @@ 
Object Functions
               

                 ¶
               
-              
Retrieve all the property names of an object.
+              
Chunk a single array into multiple arrays, each containing count or fewer
+items.
 
             

  if (hasEnumBug) collectNonEnumProps(obj, _keys);
-  return _keys;
+            
function ctor() {
+  return function(){};
 }
             
         
@@ -2222,18 +2204,18 @@ 
Object Functions
               

                 ¶
               
-              
Retrieve the values of an object’s properties.
+              
An internal function for creating a new object that inherits from another.
 
             

function createAssigner(keysFunc, defaults) {
-  return function(obj) {
-    var length = arguments.length;
-    if (defaults) obj = Object(obj);
-    if (length < 2 || obj == null) return obj;
-    for (var index = 1; index < length; index++) {
-      var source = arguments[index],
-          _keys = keysFunc(source),
-          l = _keys.length;
-      for (var i = 0; i < l; i++) {
-        var key = _keys[i];
-        if (!defaults || obj[key] === void 0) obj[key] = source[key];
-      }
-    }
-    return obj;
+            
function memoize(func, hasher) {
+  var memoize = function(key) {
+    var cache = memoize.cache;
+    var address = '' + (hasher ? hasher.apply(this, arguments) : key);
+    if (!has(cache, address)) cache[address] = func.apply(this, arguments);
+    return cache[address];
   };
+  memoize.cache = {};
+  return memoize;
 }
             
         
@@ -2369,11 +2354,16 @@ 
Object Functions
               

                 ¶
               
-              
Extend a given object with all the properties in passed-in object(s).
+              
Delays a function for the given number of milliseconds, and then calls
+it with the arguments supplied.
 
             

var extendOwn = createAssigner(keys);

var defer = partial(delay, _, 1);

function findKey(obj, predicate, context) {
-  predicate = cb(predicate, context);
-  var _keys = keys(obj), key;
-  for (var i = 0, length = _keys.length; i < length; i++) {
-    key = _keys[i];
-    if (predicate(obj[key], key, obj)) return key;
-  }
-}

var now = Date.now || function() {
+  return new Date().getTime();
+};

function keyInObj(value, key, obj) {
-  return key in obj;
+            
function throttle(func, wait, options) {
+  var timeout, context, args, result;
+  var previous = 0;
+  if (!options) options = {};
+
+  var later = function() {
+    previous = options.leading === false ? 0 : now();
+    timeout = null;
+    result = func.apply(context, args);
+    if (!timeout) context = args = null;
+  };
+
+  var throttled = function() {
+    var _now = now();
+    if (!previous && options.leading === false) previous = _now;
+    var remaining = wait - (_now - previous);
+    context = this;
+    args = arguments;
+    if (remaining <= 0 || remaining > wait) {
+      if (timeout) {
+        clearTimeout(timeout);
+        timeout = null;
+      }
+      previous = _now;
+      result = func.apply(context, args);
+      if (!timeout) context = args = null;
+    } else if (!timeout && options.trailing !== false) {
+      timeout = setTimeout(later, remaining);
+    }
+    return result;
+  };
+
+  throttled.cancel = function() {
+    clearTimeout(timeout);
+    previous = 0;
+    timeout = context = args = null;
+  };
+
+  return throttled;
 }
             
         
@@ -2439,28 +2465,41 @@ 
Object Functions
               

                 ¶
               
-              
Return a copy of the object only containing the whitelisted properties.
+              
Returns a function, that, as long as it continues to be invoked, will not
+be triggered. The function will be called after it stops being called for
+N milliseconds. If immediate is passed, trigger the function on the
+leading edge, instead of the trailing.
 
             

var omit = restArguments(function(obj, _keys) {
-  var iteratee = _keys[0], context;
-  if (isFunction(iteratee)) {
-    iteratee = negate(iteratee);
-    if (_keys.length > 1) context = _keys[1];
-  } else {
-    _keys = map(_flatten(_keys, false, false), String);
-    iteratee = function(value, key) {
-      return !contains(_keys, key);
-    };
-  }
-  return pick(obj, iteratee, context);
-});

function wrap(func, wrapper) {
+  return partial(wrapper, func);
+}

var defaults = createAssigner(allKeys, true);

function compose() {
+  var args = arguments;
+  var start = args.length - 1;
+  return function() {
+    var i = start;
+    var result = args[start].apply(this, arguments);
+    while (i--) result = args[i].call(this, result);
+    return result;
+  };
+}

function create(prototype, props) {
-  var result = baseCreate(prototype);
-  if (props) extendOwn(result, props);
-  return result;
+            
function after(times, func) {
+  return function() {
+    if (--times < 1) {
+      return func.apply(this, arguments);
+    }
+  };
 }
             
         
@@ -2534,13 +2575,19 @@ 
Object Functions
               

                 ¶
               
-              
Create a (shallow-cloned) duplicate of an object.
+              
Returns a function that will only be executed up to (but not including) the Nth call.
 
             

  if (a == null || b == null) return false;

function functions(obj) {
+  var names = [];
+  for (var key in obj) {
+    if (isFunction$1(obj[key])) names.push(key);
+  }
+  return names.sort();
+}

  if (a !== a) return b !== b;

function keyInObj(value, key, obj) {
+  return key in obj;
+}

  var type = typeof a;
-  if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
-  return deepEq(a, b, aStack, bStack);
-}

var pick = restArguments(function(obj, keys) {
+  var result = {}, iteratee = keys[0];
+  if (obj == null) return result;
+  if (isFunction$1(iteratee)) {
+    if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
+    keys = allKeys(obj);
+  } else {
+    iteratee = keyInObj;
+    keys = flatten(keys, false, false);
+    obj = Object(obj);
+  }
+  for (var i = 0, length = keys.length; i < length; i++) {
+    var key = keys[i];
+    var value = obj[key];
+    if (iteratee(value, key, obj)) result[key] = value;
+  }
+  return result;
+});

function deepEq(a, b, aStack, bStack) {

var omit = restArguments(function(obj, keys) {
+  var iteratee = keys[0], context;
+  if (isFunction$1(iteratee)) {
+    iteratee = negate(iteratee);
+    if (keys.length > 1) context = keys[1];
+  } else {
+    keys = map(flatten(keys, false, false), String);
+    iteratee = function(value, key) {
+      return !contains(keys, key);
+    };
+  }
+  return pick(obj, iteratee, context);
+});

  if (a instanceof _) a = a._wrapped;
-  if (b instanceof _) b = b._wrapped;

var defaults = createAssigner(allKeys, true);

  var className = toString.call(a);
-  if (className !== toString.call(b)) return false;
-  switch (className) {

function create(prototype, props) {
+  var result = baseCreate(prototype);
+  if (props) extendOwn(result, props);
+  return result;
+}

    case '[object RegExp]':

function tap(obj, interceptor) {
+  interceptor(obj);
+  return obj;
+}
+
+var getByteLength = shallowProperty('byteLength');
+
+var isDataView = tagTester('DataView');

    case '[object String]':

var isBufferLike = createSizePropertyCheck(getByteLength);

      return '' + a === '' + b;
-    case '[object Number]':

function constant(value) {
+  return function() {
+    return value;
+  };
+}

      if (+a !== +a) return +b !== +b;

var typedArrayPattern = /\[object ((I|Ui)nt(8|16|32)|Float(32|64)|Uint8Clamped|Big(I|Ui)nt64)Array\]/;
+function isTypedArray(obj) {

      return +a === 0 ? 1 / +a === 1 / b : +a === +b;
-    case '[object Date]':
-    case '[object Boolean]':

  return nativeIsView ? (nativeIsView(obj) && !isDataView(obj)) : isBufferLike(obj) && typedArrayPattern.test(toString.call(obj));
+}
+
+var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false);

      return +a === +b;
-    case '[object Symbol]':
-      return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
-  }
-
-  var areArrays = className === '[object Array]';
-  if (!areArrays) {
-    if (typeof a != 'object' || typeof b != 'object') return false;

function eq(a, b, aStack, bStack) {

    var aCtor = a.constructor, bCtor = b.constructor;
-    if (aCtor !== bCtor && !(isFunction(aCtor) && aCtor instanceof aCtor &&
-                             isFunction(bCtor) && bCtor instanceof bCtor)
-                        && ('constructor' in a && 'constructor' in b)) {
-      return false;
-    }
-  }

  if (a === b) return a !== 0 || 1 / a === 1 / b;

  if (a == null || b == null) return false;

  aStack = aStack || [];
-  bStack = bStack || [];
-  var length = aStack.length;
-  while (length--) {

  if (a !== a) return b !== b;

    if (aStack[length] === a) return bStack[length] === b;
-  }

  var type = typeof a;
+  if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
+  return deepEq(a, b, aStack, bStack);
+}

  aStack.push(a);
-  bStack.push(b);

function deepEq(a, b, aStack, bStack) {

  if (areArrays) {

  if (a instanceof _) a = a._wrapped;
+  if (b instanceof _) b = b._wrapped;

    length = a.length;
-    if (length !== b.length) return false;

  var className = toString.call(a);
+  if (className !== toString.call(b)) return false;
+  switch (className) {

    while (length--) {
-      if (!eq(a[length], b[length], aStack, bStack)) return false;
-    }
-  } else {

    case '[object RegExp]':

    var _keys = keys(a), key;
-    length = _keys.length;

    case '[object String]':

    if (keys(b).length !== length) return false;
-    while (length--) {

      return '' + a === '' + b;
+    case '[object Number]':

      key = _keys[length];
-      if (!(_has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
-    }
-  }

      if (+a !== +a) return +b !== +b;

  aStack.pop();
-  bStack.pop();
-  return true;
-}

      return +a === 0 ? 1 / +a === 1 / b : +a === +b;
+    case '[object Date]':
+    case '[object Boolean]':

function isEqual(a, b) {
-  return eq(a, b);
-}

      return +a === +b;
+    case '[object Symbol]':
+      return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
+    case '[object ArrayBuffer]':

function isEmpty(obj) {
-  if (obj == null) return true;
-  if (isArrayLike(obj) && (isArray(obj) || isString(obj) || isArguments(obj))) return obj.length === 0;
-  return keys(obj).length === 0;
-}

      return deepEq(new DataView(a), new DataView(b), aStack, bStack);
+    case '[object DataView]':
+      var byteLength = getByteLength(a);
+      if (byteLength !== getByteLength(b)) {
+        return false;
+      }
+      while (byteLength--) {
+        if (a.getUint8(byteLength) !== b.getUint8(byteLength)) {
+          return false;
+        }
+      }
+      return true;
+  }
+
+  if (isTypedArray$1(a)) {

function isElement(obj) {
-  return !!(obj && obj.nodeType === 1);
-}

    return deepEq(new DataView(a.buffer), new DataView(b.buffer), aStack, bStack);
+  }
+
+  var areArrays = className === '[object Array]';
+  if (!areArrays) {
+    if (typeof a != 'object' || typeof b != 'object') return false;

function tagTester(name) {
-  return function(obj) {
-    return toString.call(obj) === '[object ' + name + ']';
-  };
-}

    var aCtor = a.constructor, bCtor = b.constructor;
+    if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor &&
+                             isFunction$1(bCtor) && bCtor instanceof bCtor)
+                        && ('constructor' in a && 'constructor' in b)) {
+      return false;
+    }
+  }

var isArray = nativeIsArray || tagTester('Array');

function isObject(obj) {
-  var type = typeof obj;
-  return type === 'function' || type === 'object' && !!obj;
-}

  aStack = aStack || [];
+  bStack = bStack || [];
+  var length = aStack.length;
+  while (length--) {

var isArguments = tagTester('Arguments');
-var isFunction = tagTester('Function');
-var isString = tagTester('String');
-var isNumber = tagTester('Number');
-var isDate = tagTester('Date');
-var isRegExp = tagTester('RegExp');
-var isError = tagTester('Error');
-var isSymbol = tagTester('Symbol');
-var isMap = tagTester('Map');
-var isWeakMap = tagTester('WeakMap');
-var isSet = tagTester('Set');
-var isWeakSet = tagTester('WeakSet');

    if (aStack[length] === a) return bStack[length] === b;
+  }

(function() {
-  if (!isArguments(arguments)) {
-    isArguments = function(obj) {
-      return _has(obj, 'callee');
-    };
-  }
-}());

  aStack.push(a);
+  bStack.push(b);

var nodelist = root.document && root.document.childNodes;
-if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
-  isFunction = function(obj) {
-    return typeof obj == 'function' || false;
-  };
-}

  if (areArrays) {

function isFinite(obj) {
-  return !isSymbol(obj) && _isFinite(obj) && !_isNaN(parseFloat(obj));
-}

    length = a.length;
+    if (length !== b.length) return false;

function isNaN(obj) {
-  return isNumber(obj) && _isNaN(obj);
-}

    while (length--) {
+      if (!eq(a[length], b[length], aStack, bStack)) return false;
+    }
+  } else {

function isBoolean(obj) {
-  return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
-}

    var _keys = keys(a), key;
+    length = _keys.length;

function isNull(obj) {
-  return obj === null;
-}

    if (keys(b).length !== length) return false;
+    while (length--) {

function isUndefined(obj) {
-  return obj === void 0;
-}

      key = _keys[length];
+      if (!(has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
+    }
+  }

function has(obj, path) {
-  if (!isArray(path)) {
-    return _has(obj, path);
-  }
-  var length = path.length;
-  for (var i = 0; i < length; i++) {
-    var key = path[i];
-    if (obj == null || !hasOwnProperty.call(obj, key)) {
-      return false;
-    }
-    obj = obj[key];
-  }
-  return !!length;
+            
  aStack.pop();
+  bStack.pop();
+  return true;
 }
             
         
@@ -3322,10 +3395,14 @@ 
Object Functions
               

                 ¶
               
-              
Utility Functions
+              
Perform a deep comparison to check if two objects are equal.
 
             

function isEmpty(obj) {
+  if (obj == null) return true;

function identity(value) {
-  return value;
+            
  if (isArrayLike(obj) && (isArray(obj) || isString(obj) || isArguments$1(obj))) return obj.length === 0;
+  return keys(obj).length === 0;
 }
             
         
@@ -3364,17 +3447,31 @@ 
Utility Functions
               

                 ¶
               
-              
Predicate-generating functions. Often useful outside of Underscore.
+              
Is a given value a DOM element?
 
             

function property(path) {
+            
function isFinite$1(obj) {
+  return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj));
+}
+            
+        
+        
+        
+        

+            

+              
+              

+                ¶
+              
+              
Is a given value equal to null?
+
+            
+            
+            
function isNull(obj) {
+  return obj === null;
+}
+            
+        
+        
+        
+        

+            

+              
+              

+                ¶
+              
+              
Is a given variable undefined?
+
+            
+            
+            
function isUndefined(obj) {
+  return obj === void 0;
+}
+            
+        
+        
+        
+        

+            

+              
+              

+                ¶
+              
+              
Shortcut function for checking if an object has a given property directly
+on itself (in other words, not on a prototype).
+
+            
+            
+            
function has$1(obj, path) {
   if (!isArray(path)) {
-    return shallowProperty(path);
+    return has(obj, path);
   }
-  return function(obj) {
-    return deepGet(obj, path);
-  };
+  var length = path.length;
+  for (var i = 0; i < length; i++) {
+    var key = path[i];
+    if (obj == null || !hasOwnProperty.call(obj, key)) {
+      return false;
+    }
+    obj = obj[key];
+  }
+  return !!length;
 }
             
         
         
         
-        

+        

+            

+              
+              

+                ¶
+              
+              
Predicate-generating function. Often useful outside of Underscore.
+
+            
+            
+            
function noop(){}
+            
+        
+        
+        
+        

             

               
               

-                ¶
+                ¶
               
               
Generates a function for a given object that returns a given property.
 
@@ -3424,32 +3593,11 @@ 
Utility Functions
         
         
         
-        

-            

-              
-              

-                ¶
-              
-              
Returns a predicate for checking whether an object has a given set of
-key:value pairs.
-
-            
-            
-            
function matcher(attrs) {
-  attrs = extendOwn({}, attrs);
-  return function(obj) {
-    return isMatch(obj, attrs);
-  };
-}
-            
-        
-        
-        
-        

+        

             

               
               

-                ¶
+                ¶
               
               
Run a function n times.
 
@@ -3465,49 +3613,51 @@ 
Utility Functions
         
         
         
-        

+        

             

               
               

-                ¶
+                ¶
               
-              
Return a random integer between min and max (inclusive).
+              
Functions for escaping and unescaping strings to/from HTML interpolation.
 
             
             
-            
function random(min, max) {
-  if (max == null) {
-    max = min;
-    min = 0;
-  }
-  return min + Math.floor(Math.random() * (max - min + 1));
-}
+            
function createEscaper(map) {
+  var escaper = function(match) {
+    return map[match];
+  };
             
         
         
         
-        

+        

             

               
               

-                ¶
+                ¶
               
-              
A (possibly faster) way to get the current timestamp as an integer.
+              
Regexes for identifying a key that needs to be escaped.
 
             
             
-            
var now = Date.now || function() {
-  return new Date().getTime();
-};
+            
  var source = '(?:' + keys(map).join('|') + ')';
+  var testRegexp = RegExp(source);
+  var replaceRegexp = RegExp(source, 'g');
+  return function(string) {
+    string = string == null ? '' : '' + string;
+    return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
+  };
+}
             
         
         
         
-        

+        

             

               
               

-                ¶
+                ¶
               
               
List of HTML entities for escaping.
 
@@ -3520,59 +3670,61 @@ 
Utility Functions
   '"': '&quot;',
   "'": '&#x27;',
   '`': '&#x60;'
-};
-var unescapeMap = invert(escapeMap);