@thi.ng/compare

What is @thi.ng/compare?

@thi.ng/compare is a utility library for various comparison operations in JavaScript. It provides a collection of comparator functions for different data types and use cases, making it easier to perform sorting, equality checks, and other comparison-based operations.

What are @thi.ng/compare's main functionalities?

Basic Comparators

Provides basic comparator functions for general use, including ascending and descending numerical comparisons.

const { compare, compareNumAsc, compareNumDesc } = require('@thi.ng/compare');

console.log(compare(5, 10)); // -1
console.log(compareNumAsc(5, 10)); // -1
console.log(compareNumDesc(5, 10)); // 1

String Comparators

Includes specialized comparators for string values, with options for case-sensitive and case-insensitive comparisons.

const { compareStr, compareStrCaseInsensitive } = require('@thi.ng/compare');

console.log(compareStr('apple', 'banana')); // -1
console.log(compareStrCaseInsensitive('Apple', 'apple')); // 0

Array Comparators

Allows for comparison of arrays, element by element, to determine their order or equality.

const { compareArrays } = require('@thi.ng/compare');

console.log(compareArrays([1, 2, 3], [1, 2, 4])); // -1
console.log(compareArrays([1, 2, 3], [1, 2, 3])); // 0

Object Comparators

Provides comparators for objects based on specific keys, useful for sorting arrays of objects.

const { compareByKey } = require('@thi.ng/compare');

const obj1 = { id: 1, name: 'Alice' };
const obj2 = { id: 2, name: 'Bob' };
console.log(compareByKey('id')(obj1, obj2)); // -1

Other packages similar to @thi.ng/compare

lodash

Lodash is a popular utility library that provides a wide range of functions for common programming tasks, including comparison operations. It offers functions like _.isEqual for deep equality checks and _.sortBy for sorting collections. Compared to @thi.ng/compare, Lodash is more comprehensive but also larger in size.

fast-deep-equal

fast-deep-equal is a small and fast library for deep equality checks. It is highly optimized for performance and is often used when deep comparison of objects or arrays is needed. Unlike @thi.ng/compare, it focuses solely on deep equality and does not provide other comparison utilities.

ramda

Ramda is a functional programming library for JavaScript that includes a variety of utility functions, including comparison functions like R.equals and R.sort. It emphasizes immutability and functional programming principles. While it offers similar comparison functionalities, it is part of a broader functional programming toolkit.

README

This project is part of the @thi.ng/umbrella monorepo.

• About
  • Status
• Installation
• Dependencies
• Usage examples
• API
• Authors
• License

About

Comparators with support for types implementing the @thi.ng/api ICompare interface.

Status

STABLE - used in production

Installation

yarn add @thi.ng/compare

Package sizes (gzipped): ESM: 0.2KB / CJS: 0.2KB / UMD: 0.3KB

Dependencies

None

Usage examples

Several demos in this repo's /examples directory are using this package.

A selection:

triple-query

Live demo | Source

API

Generated API docs

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));
// -1

Authors

Karsten Schmidt

License

© 2016 - 2020 Karsten Schmidt // Apache Software License 2.0