feat(checks): add date, map, nan, set checks

thi-ng · Apr 26, 2018 · a865f62 · a865f62
1 parent d057d95
commit a865f62
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Showing 6 changed files with 17 additions and 1 deletion.
diff --git a/packages/checks/src/index.ts b/packages/checks/src/index.ts
@@ -13,6 +13,7 @@ export * from "./is-arraylike";
 export * from "./is-blob";
 export * from "./is-boolean";
 export * from "./is-chrome";
+export * from "./is-date";
 export * from "./is-even";
 export * from "./is-false";
 export * from "./is-file";
@@ -22,7 +23,9 @@ export * from "./is-ie";
 export * from "./is-in-range";
 export * from "./is-int32";
 export * from "./is-iterable";
+export * from "./is-map";
 export * from "./is-mobile";
+export * from "./is-nan";
 export * from "./is-negative";
 export * from "./is-node";
 export * from "./is-null";
@@ -35,6 +38,7 @@ export * from "./is-promise";
 export * from "./is-promiselike";
 export * from "./is-regexp";
 export * from "./is-safari";
+export * from "./is-set";
 export * from "./is-string";
 export * from "./is-symbol";
 export * from "./is-transferable";

diff --git a/packages/checks/src/is-date.ts b/packages/checks/src/is-date.ts
@@ -0,0 +1,3 @@
+export function isDate(x: any): x is Date {
+    return x instanceof Date;
+}
diff --git a/packages/checks/src/is-map.ts b/packages/checks/src/is-map.ts
@@ -0,0 +1,3 @@
+export function isMap(x: any): x is Set<any> {
+    return x instanceof Map;
+}
diff --git a/packages/checks/src/is-nan.ts b/packages/checks/src/is-nan.ts
@@ -0,0 +1,3 @@
+export function isNaN(x: any) {
+    return x !== x;
+}
diff --git a/packages/checks/src/is-plain-object.ts b/packages/checks/src/is-plain-object.ts
@@ -4,7 +4,7 @@
  *
  * @param x
  */
-export function isPlainObject(x: any): x is Object {
+export function isPlainObject(x: any): x is object {
     let proto;
     return Object.prototype.toString.call(x) === "[object Object]" &&
         (proto = Object.getPrototypeOf(x), proto === null || proto === Object.getPrototypeOf({}));

diff --git a/packages/checks/src/is-set.ts b/packages/checks/src/is-set.ts
@@ -0,0 +1,3 @@
+export function isSet(x: any): x is Set<any> {
+    return x instanceof Set;
+}