JSPM

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

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

TypedArray polyfill for old browsers

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

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

Creates a shallow clone of any JavaScript value.

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

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

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

Remove duplicate values from an array. Fastest ES5 implementation.

Parse postgres array columns

Rotates values in array.

a few common utility template tags for ES2015

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

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

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

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.

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

Map `visit` over an array of objects.

Create an array by repeating the given value n times.

Recursively flatten an array or arrays.

Create an array without duplicates

Utils for working with JavaScript classes and prototype methods.

Iterator abstraction based on ES6 specification

Get a compare function for array to sort

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

Turn anything into an array

Isomorphic, functional type-checking for Javascript

Guarantees an array back

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

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

List of text file extensions

ES2015 `Array#findIndex()` ponyfill

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

Join paths and globs.

Array methods for ES6 Iterators

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

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

Removes duplicates from a sorted array in place

Like an array, but rounder.

Get the longest item in an array.

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

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

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

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Check if two arrays are equal

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

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

Microsoft sucks

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

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

ES spec-compliant shim for TypedArray.prototype.slice

Concatenate a readable stream's data into a single array

List of Markdown file extensions

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

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.

Run an array of functions in series

Get the last or last n elements in an array.

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

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

Validates if a value is an array.

Array#filter for older browsers.

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

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

Validates if a value is an integer array.

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

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

Faster alternative to javascript's native filter method.

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

Computes the greatest common divisor (gcd).

Computes the least common multiple (lcm).

An optionally-asynchronous forEach with an interesting interface.

Rotates values in array.

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.

make a shallow copy of an object or array

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

filter in array tree

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

Treat multiple buffers as one

Sort array elements in descending order.

Sort the keys in an object.

Sort array elements in ascending order.

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

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

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

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

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

Make any value an array. No dependencies.

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

Multidimensional Arrays

Microsoft sucks

`[].reduce()` for old browsers

Watch an object or array for changes

Make array iteration easy when using async/await and Promises

Generates an array of consecutive integers starting at 0

Check whether a value is "empty".

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

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

Reuse typed arrays

Test if a value is an array.

Test if a value is a Float64Array.

Float32Array.

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

Safely push each item of an array to a stream

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

Test if a value is a Uint32Array.

Sort an array on an object property

Float64Array.

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

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Maximum unsigned 32-bit integer.

Return a data type from a string representing the type

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Uint32Array.

Uint16Array.

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

creates a new array with given range

Find [nd-]array min/max values

Rearrange array elements by index array

Simple iterator for flat and multi section lists

List of getter/setter properties for JavaScript types

Convert Buffer to ArrayBuffer

Move an array item to a different position

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

flattens nested vertex data into a typed array

List of properties for JavaScript objects

List of JavaScript types

Deep copy objects and arrays

The swiss army knife for binary data in JavaScript.

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

Returns an array containing the initial elements which both input arrays have in common

Makes easy to convert JSON to CSV

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.

Comma delimit an array for human readability, the Oxford comma is optional.

Array / Arraylike utilities

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

Creates a real Array from almost anything.

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

Chai plugin for JSON Schema v4

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

A fast implementation of a fisher-yates shuffle that does not mutate the source array.

Merge two lists, trying to preserve the order of both

Extensible deep value equivalence checking for any data types

Return true if the given number is even.

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

Functional tree editing, manipulation & navigation

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

Recursively iterates over arrays and objects

high-performance, zero-dependency circular reference check for objects (or arrays)

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

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

Computes the L2 norm (Euclidean norm) of an array of values.

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.

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

Rotates two-dimensional arrays clockwise by 90 degrees, 180 degrees, or 270 degrees

Flatten a nested 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.

Module for working with CIDR (v4, v6)

List of common default router IP addresses

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

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

A utility function to index arrays by any criteria

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

Lazily initialized properties for objects

recursive object extending & overriding

Turn an array into a list of comma-separated values, appropriate for use in an English sentence.

Sort string index ranges

Object -> [[key0, value0], [key1, value1]...]

Asynchronous iterator function for parallel processing.

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

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

Pipe an Array through Node.js streams

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.

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

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.

Fast intersection of multiple arrays

Check if the given value is an Array

Randomize the order of the elements in a given array.

Like lodash's _.defaultsDeep, but with array preservation

Returns an array filled with the specified input

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.

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

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

Create an error from an array of error messages

Execute a method out from an object.

A complete, fully tested data structure library written in TypeScript.

Rotate array by n positions

Get consecutively unique elements from an array

remove items from a javascript array without generating memory garbage

create a new array filled with a value, or zero

Transform dot-delimited strings to array of strings for Node.js and the browser.

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

Find the intersection of two arrays

Uppercase first character of each element in arrays of strings.

A function for iterating over objects, arrays, strings and ranges

A map function that can map over almost anything.

Remembers the highest/lowest values in a data set of any size.

Collection of image extensions

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

Circular fixed size array

List of video file extensions

Creates and makes an array without duplicates. Even with array of objects with a specified matcher.

Bind data arrays to any type of JS objects

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

Group array of objects into lists.

Convert Gitignore to Glob patterns

Rotate a data array

Sparse array implementation in JS with no dependencies

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

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

Randomize the order of items in an array

Convert base64/datauri/plain string to ArrayBuffer

Utility for modifying / processing the contents of Javascript objects or arrays via object notation strings or globs.

compare two collections

Returns `true` if the given string or array starts with prefix using strict equality for comparisons. Using fastest implementation.

A BBCode to AST Parser part of @bbob

Returns `true` if the given `string` or `array` ends with `suffix` using strict equality for comparisons.

Count leading zeros in a Buffer (clz)

flatten() utility function

Check if an object is an array or a typed array

An ES-spec-compliant (proposed) Array.prototype.at shim/polyfill/replacement that works as far down as ES3

Prettier plugin to force all arrays to be multiline.

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

MongoDB-style object operators makes array manipulation easy: where/order/update/view

When you want array.some but not array.every. Useful when you need to determine partially selected states - like partially selecting tree nodes when some but not all child nodes are checked.

Set of (possibly rotated) arrays

Swap two items in an array. Does not modify the Array prototype.

Convert an array to a csv formatted string

find all combinations from array

Run promise-returning & async functions in series

Implementation of paper 'An O(ND) Difference Algorithm and Its Variations' on array

Convert any binary data to ArrayBuffer

Asynchronously calls a function on each element in an array in parallel.

List of US states and territories.

In an array of objects, this enables a property on the object at the specified index, while disabling the property on all other objects.

a map from arrays of values to values

Invoke getter/setter functions on array-like objects

dedupes an array

Replaces `arr.includes(val)' with `arr.indexOf(val) >= 0`.

Chunk converts arrays like `[1,2,3,4,5]` into arrays of arrays like `[[1,2], [3,4], [5]]`.

Detect which ES6 (ES2015 and above) features are available