JSPM

Copy part of array to another array, like Array.slice().

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

Copy values from x into y.

Creates a shallow clone of any JavaScript value.

Utils for working with JavaScript classes and prototype methods.

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

Inserts a sub-array into an array starting at the given index. Returns a copy

Removes duplicates from a sorted array in place

ArrayLike copying for JavaScript

Get the first fulfilled promise that satisfies the provided testing function

Get the first path that exists on disk of multiple paths

Get the native type of a value.

Array#isArray for older browsers

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

Determines if an object can be used as an array

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`

Tiny queue data structure

Minimal async jobs utility library, with streams support

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.

Run an array of functions in parallel

Copies part of array to another.

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.

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

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

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

List of binary file extensions

Is this value a JS ArrayBuffer?

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

Flatten nested arrays

Is this value a JS SharedArrayBuffer?

ES spec-compliant shim for ArrayBuffer.prototype.slice

Robustly get the byte length of a Typed Array

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

Robustly get the byte offset of a Typed Array

A list of SPDX license identifiers

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

A simple list of possible Typed Array names.

extend like a boss

Robustly get the length of a Typed Array

Return a shallow copy of a portion of an array.

Convert a value to an array

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

Simply swizzle your arguments

Detect whether or not an object is a Typed Array

Remove circular references from objects

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

The swiss army knife for binary data in JavaScript.

TypedArray polyfill for old browsers

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

Array manipulation, ordering, searching, summarizing, etc.

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

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

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.

Parse postgres array columns

Copies part of array within.

Remove duplicate values from an array. Fastest ES5 implementation.

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

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.

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

Iterator abstraction based on ES6 specification

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

Get a compare function for array to sort

Turn anything into an array

Guarantees an array back

Copy values from one complex double-precision floating-point vector to another complex double-precision floating-point vector.

Isomorphic, functional type-checking for Javascript

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

Copy values from one complex single-precision floating-point vector to another complex single-precision floating-point vector.

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

Like an array, but rounder.

Get the longest item in an array.

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

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

Replace or remove multiple items in an array.

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.

Check if two arrays are equal

Push items to an array at their correct sort-position

Typescript-compatible minimalistic shallow equality check for arrays/objects

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.

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

Microsoft sucks

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

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

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

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

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

Validates if a value is an array.

Array#filter for older browsers.

Validates if a value is an integer array.

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

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.

Computes the greatest common divisor (gcd).

A Node-RED node to copy array data obtained from influxdb out node and display it on FlowFuse Dashboard 2.0

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

Computes the least common multiple (lcm).

An optionally-asynchronous forEach with an interesting interface.

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.

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

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

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.

Convert a string to utf8 byte array or vice versa.

Sort the keys in an object.

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

Sort array elements in ascending order.

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

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

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

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

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

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".

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

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

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

Test if a value is an array.

Reuse typed arrays

Float64Array.

Test if a value is a Float64Array.

Safely push each item of an array to a stream

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

Float32Array.

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

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Sort an array on an object property

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

Test if a value is a Uint32Array.

Maximum unsigned 32-bit integer.

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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

Given an array, shuffles a cloned copy, and returns it. (Fisher–Yates method)

Rotate all items in an array

creates a new array with given range

Rearrange array elements by index array

Find [nd-]array min/max values

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

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

flattens nested vertex data into a typed array

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

List of properties for JavaScript objects

List of JavaScript types

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

Copies missing properties to the target object.

Makes easy to convert JSON to CSV

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.

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

Rotate an array by a given number of steps

Shuffle and unshuffle an array by seed/key.

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

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.

Array / Arraylike utilities

Chai plugin for JSON Schema v4

Returns independent copy of a passed array

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

Creates a real Array from almost anything.

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

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.

Functional tree editing, manipulation & navigation

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

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)

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

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.

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

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

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

List of common default router IP addresses

Flatten a nested array.

Module for working with CIDR (v4, v6)

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

A utility function to index arrays by any criteria

recursive object extending & overriding

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

Lazily initialized properties for objects

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

Sort string index ranges

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

Removes specified values from the end of an array.

Create an immutable clone or copy of data. This could be an array, object, map, set or function.

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

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Asynchronous iterator function for parallel processing.

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.

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

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

Pipe an Array through Node.js streams

Check if the given value is an 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.

Fast intersection of multiple arrays

Immutable Array.prototype.copyWithin().

Randomize the order of the elements in a given array.

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