JSPM

Binary sorted array. Implements array initialization, insertion, finding index of element, item removal, clearing the array.

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

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`

Minimal async jobs utility library, with streams support

Tiny queue data structure

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

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

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.

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

List of binary file extensions

ES spec-compliant shim for ArrayBuffer.prototype.slice

Is this value a JS ArrayBuffer?

Flatten nested arrays

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

A list of SPDX license identifiers

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

Robustly get the byte length of a Typed Array

Is this value a JS SharedArrayBuffer?

Robustly get the byte offset of a Typed Array

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

Convert a value to an array

Simply swizzle your arguments

Detect whether or not an object is a Typed Array

TypedArray polyfill for old browsers

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

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

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

Array manipulation, ordering, searching, summarizing, etc.

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

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

Parse postgres array columns

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

Creates a shallow clone of any JavaScript value.

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

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

Remove duplicate values from an array. Fastest ES5 implementation.

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

a few common utility template tags for ES2015

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.

Sort the keys of an object

Create an array by repeating the given value n times.

Recursively flatten an array or arrays.

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

Map `visit` over an array of objects.

Iterator abstraction based on ES6 specification

Utils for working with JavaScript classes and prototype methods.

Create an array without duplicates

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

Turn anything into an array

Get a compare function for array to sort

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

Guarantees an array back

Isomorphic, functional type-checking for Javascript

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

List of text file extensions

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

Join paths and globs.

ES2015 `Array#findIndex()` ponyfill

Like an array, but rounder.

Array methods for ES6 Iterators

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

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

Removes duplicates from a sorted array in place

Get the longest item in an array.

Replace or remove multiple items 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.

Check if two arrays are equal

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

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

Typescript-compatible minimalistic shallow equality check for arrays/objects

ES spec-compliant shim for TypedArray.prototype.slice

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

Microsoft sucks

Concatenate a readable stream's data into a single array

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

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

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.

Faster alternative to javascript's native filter method.

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

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

Computes the greatest common divisor (gcd).

Validates if a value is an integer array.

Array#filter for older browsers.

make a shallow copy of an object or array

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

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.

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

Treat multiple buffers as one

filter in array tree

Sort array elements in descending order.

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.

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

Make any value an array. No dependencies.

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)

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

Multidimensional Arrays

Watch an object or array for changes

Microsoft sucks

Make array iteration easy when using async/await and Promises

Check whether a value is "empty".

`[].reduce()` for old browsers

Generates an array of consecutive integers starting at 0

Test if a value is an array.

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

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

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

Maximum unsigned 32-bit integer.

Safely push each item of an array to a stream

Reuse typed arrays

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Float64Array.

Sort an array on an object property

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

Uint8Array.

Test if a value is a Uint32Array.

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.

Return a data type from a string representing the type

Uint32Array.

Uint16Array.

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Deep-merge the values of one object structure into another

Rearrange array elements by index array

Initialize an array of arrays to a constant

Rotate all items in an array

creates a new array with given range

Find [nd-]array min/max values

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

Convert Buffer to ArrayBuffer

Deep copy objects and arrays

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

Simple iterator for flat and multi section lists

Move an array item to a different position

List of getter/setter properties for JavaScript types

flattens nested vertex data into a typed array

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

List of properties for JavaScript objects

List of JavaScript types

The swiss army knife for binary data in JavaScript.

Rotate an array by a given number of steps

Makes easy to convert JSON to CSV

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

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.

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

Array / Arraylike utilities

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

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

Chai plugin for JSON Schema v4

Creates a real Array from almost anything.

Functional tree editing, manipulation & navigation

Return true if the given number is even.

Extensible deep value equivalence checking for any data types

Merge two lists, trying to preserve the order of both

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

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

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

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

Recursively iterates over arrays and objects

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

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

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.

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

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

A utility function to index arrays by any criteria

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

Module for working with CIDR (v4, v6)

Flatten a nested array.

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.

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.

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

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

Lazily initialized properties for objects

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

Sort string index ranges

Asynchronous iterator function for parallel processing.

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

Check if the given value is an Array

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

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

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.

Pipe an Array through Node.js streams

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

Fast intersection of multiple arrays

Randomize the order of the elements in a given array.

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

Execute a method out from an object.

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.

Returns an array filled with the specified input

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

create a new array filled with a value, or zero

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

Find the intersection of two arrays

List of video file extensions

Get consecutively unique elements from an array

A map function that can map over almost anything.

Convert Gitignore to Glob patterns

remove items from a javascript array without generating memory garbage

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

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

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

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

Uppercase first character of each element in arrays of strings.

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

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

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

Sparse array implementation in JS with no dependencies

Collection of image extensions

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

Bind data arrays to any type of JS objects

Circular fixed size array

Group array of objects into lists.