JSPM

🐊Putout plugin adds ability to convert array copy to slice

make a shallow copy of an object or array

Deep copy objects and arrays

An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.

Copy or deep clone a value to an arbitrary depth.

Copy or deep clone a value to an arbitrary depth.

Creates a shallow clone of any JavaScript value.

Get the first fulfilled promise that satisfies the provided testing function

Guarantees an array back

Get the first path that exists on disk of multiple paths

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.

Utils for working with JavaScript classes and prototype methods.

Run an array of functions in parallel

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Tiny queue data structure

User-friendly glob matching

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

A parallel, asynchronous implementation of forEach in ES6 with a configurable maximum degree of parallelism.

Array manipulation, ordering, searching, summarizing, etc.

Array#isArray for older browsers

Get the native type of a value.

Simple javascript lib for converting a [comma || space] delimited string to an array

Returns true if a value is a plain object, array or function.

Removes duplicates from a sorted array in place

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Minimal async jobs utility library, with streams support

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

Convert a value to an array

ES spec-compliant shim for ArrayBuffer.prototype.slice

A ponyfill for the ES 2015 (ES6) `Array.from()`.

extend like a boss

An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.

Simple to use (Angular) component for viewing text, such as JSON and arrays, with a 'copy to clipboard' option.

Map `visit` over an array of objects.

An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.

A static list of the Node.js builtin modules from the latest Node.js version

Remove circular references from objects

Determines if an object can be used as an array

Iterator abstraction based on ES6 specification

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Array methods for ES6 Iterators

Concatenate a readable stream's data into a single array

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Create an array of unique values, in order, from the input arrays

List of binary file extensions

Check if a string matches the name of a Node.js builtin module

Makes easy to convert JSON to CSV

Sort the keys of an object

Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.

Flatten nested arrays

A simple and composable way to validate data in JavaScript (and TypeScript).

Create an array by repeating the given value n times.

Robustly get the byte length of a Typed Array

Robustly get the byte offset of a Typed Array

Is this value a JS ArrayBuffer?

Copy values from x into y.

Is this value a JS SharedArrayBuffer?

A simple list of possible Typed Array names.

A list of SPDX license identifiers

Create an array with values that are present in the first input array but not additional ones

Join all elements of an array and create a human-readable string

Robustly get the length of a Typed Array

Iterate any iterable JS value. Works robustly in all environments, all versions.

Replace or remove multiple items in an array.

An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.

Get a compare function for array to sort

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

Simply swizzle your arguments

Detect whether or not an object is a Typed Array

Like an array, but rounder.

TypedArray polyfill for old browsers

Push an array of items into an array, while being robust against prototype modification

The swiss army knife for binary data in JavaScript.

Run an array of functions in parallel, but limit the number of tasks executing at the same time

Module for working with CIDR (v4, v6)

Loop over each item in an array and call the given function on every element.

Parse postgres array columns

a few common utility template tags for ES2015

Remove duplicate values from an array. Fastest ES5 implementation.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Push items to an array at their correct sort-position

Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.

Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.

Visit a method over the items in an object, or map visit over the objects in an array.

Run promise-returning & async functions in series, each passing its result to the next

Recursively flatten an array or arrays.

Return a partial object copy containing only specified keys.

`Array#forEach()` but it’s possible to define where to move to next

Return a partial object copy excluding specified keys.

Create an array without duplicates

ES spec-compliant shim for TypedArray.prototype.slice

No-bullshit super-simple es7 collections shim for Array#includes, Object.values, Object.entries

An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.

An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.

Copy the elements of an indexed array-like object to a new generic array.

Convert an array to a csv formatted string

Run an array of functions in series

A order-map collection in the form of key, value, that ensures the index.

Turn anything into an array

Return true if a value is a valid glob pattern or patterns.

Isomorphic, functional type-checking for Javascript

No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.

List of text file extensions

Converts an array of items with ids and parent ids to a nested tree in a performant `O(n)` way. Runs in browsers and node.

Iterates over the elements in an array, returning an array with only the elements for which the callback returns truthy.

ES2015 `Array#findIndex()` ponyfill

Creates a real Array from almost anything.

Join paths and globs.

finds an item in an array matching a predicate function, and returns its index

A simple and composable way to validate data in JavaScript (and TypeScript).

Treat multiple buffers as one

Isomorphic map-reduce function to flatten an array into the supplied array

Test if a value is a Float64Array.

Float32Array.

Test if a value is a Uint32Array.

Test if a value is an array.

Return a function which tests if every element in an array passes a test condition.

Maximum unsigned 32-bit integer.

Float64Array.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Convert Buffer to ArrayBuffer

Get the last or last n elements in an array.

Uint32Array.

Get the longest item in an array.

Test if a value is a Float32Array.

Uint16Array.

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Faster alternative to javascript's native filter method.

Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license

Allows deep cloning of plain objects that contain primitives, nested plain objects, or nested plain arrays.

Convert a string to utf8 byte array or vice versa.

A tiny, faster alternative to native Array.prototype.every

Faster, node.js focused alternative to JavaScript's native array map.

Rotate an array by a given number of steps

Check if two arrays are equal

Microsoft sucks

A commonly used array copy utility. (arrayCopy and arrayCopyTo)

Move an array item to a different position

Convert an 'address:port' string to an array [address:string, port:number]

Returns a copy of an object, sorted deeply by its keys, without mangling any arrays inside of it

Sorts any JavaScript array in a predictable way (deep equal arrays are always sorted in the same order)

Casts the given value to a flatten array, and removes falsey items (similar to lodash compact).

Find the first element in an array that passes a callback test. Equivalent to underscore.find()

Give eachr an item to iterate (array, object or map) and an iterator, then in return eachr gives iterator the value and key of each item, and will stop if the iterator returned false.

Normalize array (possibly n-dimensional) to zero mean and unit variance

Compare your item to items in an array and get the closest one.

List of Markdown file extensions

A faster Node.js alternative to Array.prototype.slice.call(arguments)

Simple ES6 Array.prototype.findIndex polyfill for older environments.

Find the greatest satisfied semver range from an array of ranges.

Allows deep cloning of plain objects that contain primitives, nested plain objects, or nested plain arrays.

flattens nested vertex data into a typed array

Return a JSON representation of a typed array.

An RxJS map operator that takes an observable of arrays as input and emits arrays where each element represents emissions from the projected observable.

Validates if a value is an array.

Merge two lists, trying to preserve the order of both

Returns true if the given is falsey (according to JavaScript) or matches a 'falsey' keyword.

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

Chai plugin for JSON Schema v4

Array#filter for older browsers.

Validates if a value is an integer array.

Safely push each item of an array to a stream

Get all but the last element or last n elements of an array.

Computes the greatest common divisor (gcd).

An optionally-asynchronous forEach with an interesting interface.

Deep-merge the values of one object structure into another

A utility function to index arrays by any criteria

Computes the least common multiple (lcm).

Return a data type from a string representing the type

Fast and powerful array sorting. Sort an array of objects by one or more properties. Any number of nested properties or custom comparison functions may be used.

Create an error from an array of error messages

filter in array tree

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Isomorphic, load-anywhere function to sort an array by scalar, deep or computed values in any standard or custom order

Shuffle and unshuffle an array by seed/key.

Sort array elements in descending order.

Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER.

Functional tree editing, manipulation & navigation

Sort the keys in an object.

Sort array elements in ascending order.

Run an array of functions in series, each passing its results to the next function (waterfall)

Initialize an array of arrays to a constant

Adds array support to node-glob, sync and async. Also supports tilde expansion (user home) and resolving to global npm modules.

creates a new array with given range

ES6 Array.find ponyfill. Return the first array element which satisfies a testing function.

Asynchronous iterator function for parallel processing.

Fast intersection of multiple arrays

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Make any value an array. No dependencies.

Returns an array filled with the specified input

`[].map(f)` for older browsers

Multidimensional Arrays

Read, write or test a data structure's nested property via a string like 'my.nested.property'. It works through arrays and objects.'

Array / Arraylike utilities

Watch an object or array for changes

Blazing fast, tree-shakeable, type-safe, modern utility library to sort any type of array in less than 1 KB!

Microsoft sucks

Flatten a nested array.

A data structure that combines a hash and an array for fast dictionary lookup and traversal by complex keys.

Uniquely flexible and light-weight utility for cloning and deep (recursive) merging of JavaScript objects. Supports descriptor values, accessor functions, and custom prototypes. Provides advanced options for customizing the clone/merge process.

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Prettier plugin to force all arrays to be multiline.

Converts value to an integer suitable for use as the length of an array-like object.

A map function that can map over almost anything.

Parse dotenv files for Boolean, Array, and Number variable types, built for CrocodileJS

Copy the elements of an array-like object to a new generic array.

Promised First-In-First-Out buffer. Await on push to be told when a value is consumed and await on shift for a value to consume when the buffer is empty.

Generates an array of consecutive integers starting at 0

Works like String.prototype.replace but outputs an array. Useful for replacing parts of the string with objects of other types.

Make array iteration easy when using async/await and Promises

Extensible deep value equivalence checking for any data types

Copies missing properties to the target object.

Bind data arrays to any type of JS objects

`[].reduce()` for old browsers

remove items from a javascript array without generating memory garbage

Convert base64/datauri/plain string to ArrayBuffer

Convert Gitignore to Glob patterns

Async array reduce. Asynchronously applies a function against an accumulator and each element in an array (from left to right, in series) to reduce it to a single value.

Check whether a value is "empty".

Object/Array shallow copy

Wrapper for [braces] to enable brace expansion for arrays of patterns.

Get unique values of an array. Really, like deeply unique.

🔧 Fast, modern, and practical utility library for FP in TypeScript.

Sort an array on an object property

Removes specified values from the end of an array.

Recursively iterates over arrays and objects

Reuse typed arrays

Packs an array-of-arrays into a single ndarray

Convert any binary data to ArrayBuffer

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Sort objects by property names using native Array.sort()

Lazily initialized properties for objects

Reduce an array to unique values, optionally into a separate array.

An ES spec-compliant `Array.prototype.forEach` shim/polyfill/replacement that works as far down as ES3.

Rotate all items in an array

Find [nd-]array min/max values

The Type Conversion Library. Numbers, Strings, Arrays, Maps, Objects, and Iterators.

Rearrange array elements by index array

List of getter/setter properties for JavaScript types