This project is part of the @thi.ng/umbrella monorepo.
Comparators with optional support for types implementing the @thi.ng/api
ICompare
interface.
Since v1.2.0 additional higher-order comparators are included, e.g. to reverse the ordering of an existing comparator and allow hierarchical sorting by multiple keys/dimensions, each with their own optional comparator. See examples below.
STABLE - used in production
Search or submit any issues for this package
yarn add @thi.ng/compareES module import:
<script type="module" src="https://cdn.skypack.dev/@thi.ng/compare"></script>For Node.js REPL:
const compare = await import("@thi.ng/compare");Package sizes (brotli'd, pre-treeshake): ESM: 393 bytes
Several demos in this repo's /examples directory are using this package.
A selection:
| Screenshot | Description | Live demo | Source |
|---|---|---|---|
 |
Color palette generation via dominant color extraction from uploaded images | Demo | Source |
| Full umbrella repo doc string search w/ paginated results | Demo | Source | |
 |
Triple store query results & sortable table | Demo | Source |
import { ICompare } from "@thi.ng/api";
import { compare } from "@thi.ng/compare";
class Foo implements ICompare<Foo> {
x: number;
constructor(x: number) {
this.x = x;
}
compare(o: Foo) {
return compare(this.x, o.x);
}
}
compare(new Foo(1), new Foo(2));
// -1Key-based object comparison is supported for 1 - 4 keys / dimensions.
import * as cmp from "@thi.ng/compare";
const src = [
{ id: "charlie", age: 66 },
{ id: "bart", age: 42 },
{ id: "alice", age: 23 },
{ id: "dora", age: 11 },
];
// cluster sort by id -> age (default comparators)
[...src].sort(cmp.compareByKeys2("id", "age"));
// [
// { id: 'alice', age: 23 },
// { id: 'bart', age: 42 },
// { id: 'charlie', age: 66 },
// { id: 'dora', age: 11 }
// ]
// cluster sort by age -> id (default comparators)
[...src].sort(cmp.compareByKeys2("age", "id"));
// [
// { id: 'dora', age: 11 },
// { id: 'alice', age: 23 },
// { id: 'bart', age: 42 },
// { id: 'charlie', age: 66 }
// ]
// cluster sort by age -> id
// (custom comparator for `age` key)
[...src].sort(cmp.compareByKeys2("age", "id", cmp.compareNumDesc));
// [
// { id: 'charlie', age: 66 },
// { id: 'bart', age: 42 },
// { id: 'alice', age: 23 },
// { id: 'dora', age: 11 }
// ]
// using `reverse()` comparator for `id`
[...src].sort(cmp.compareByKeys2("age", "id", cmp.compare, cmp.reverse(cmp.compare)));
// [
// { id: 'dora', age: 11 },
// { id: 'alice', age: 23 },
// { id: 'bart', age: 42 },
// { id: 'charlie', age: 66 }
// ]If this project contributes to an academic publication, please cite it as:
@misc{thing-compare,
title = "@thi.ng/compare",
author = "Karsten Schmidt",
note = "https://thi.ng/compare",
year = 2016
}© 2016 - 2023 Karsten Schmidt // Apache License 2.0