JSPM

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

Validates if a value is an array.

Array#filter for older browsers.

Get the last or last n elements in an array.

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

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

Validates if a value is an integer array.

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

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

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

An optionally-asynchronous forEach with an interesting interface.

Computes the least common multiple (lcm).

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

Sort the keys in an object.

Sort array elements in ascending order.

Treat multiple buffers as one

Sort array elements in descending order.

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

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

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

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)

Microsoft sucks

Multidimensional Arrays

`[].reduce()` for old browsers

Watch an object or array for changes

Generates an array of consecutive integers starting at 0

Make array iteration easy when using async/await and Promises

Check whether a value is "empty".

Test if a value is an array.

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

Test if a value is a Float64Array.

Float32Array.

Test if a value is a Uint32Array.

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

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

Reuse typed arrays

Float64Array.

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

Maximum unsigned 32-bit integer.

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

Uint8Array.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Safely push each item of an array to a stream

Sort an array on an object property

Test if a value is a Float32Array.

Packs an array-of-arrays into a single ndarray

Uint32Array.

Uint16Array.

Return a data type from a string representing the type

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

Rotate all items in an array

creates a new array with given range

Rearrange array elements by index array

List of getter/setter properties for JavaScript types

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

Find [nd-]array min/max values

Simple iterator for flat and multi section lists

flattens nested vertex data into a typed array

Move an array item to a different position

Convert Buffer to ArrayBuffer

Deep copy objects and 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

The swiss army knife for binary data in JavaScript.

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.

Rotate an array by a given number of steps

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

Chai plugin for JSON Schema v4

Creates a real Array from almost anything.

Computes the dot product between two numeric 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.

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

Functional tree editing, manipulation & navigation

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

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

Recursively iterates over arrays and objects

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.

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.

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.

Flatten a nested array.

List of common default router IP addresses

Module for working with CIDR (v4, v6)

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.

Sort string index ranges

A utility function to index arrays by any criteria

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

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

recursive object extending & overriding

Lazily initialized properties for objects

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

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.

Asynchronous iterator function for parallel processing.

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

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

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

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

Randomize the order of the elements in a given array.

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.'

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

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

Execute a method out from an object.

Create an error from an array of error messages

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

create a new array filled with a value, or zero

remove items from a javascript array without generating memory garbage

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

Find the intersection of two arrays

Get consecutively unique elements from an array

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

A map function that can map over almost anything.

List of video file extensions

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

Uppercase first character of each element in arrays of strings.

Group array of objects into lists.

Collection of image extensions

Circular fixed size array

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

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

Bind data arrays to any type of JS objects

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

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

Convert Gitignore to Glob patterns

Sparse array implementation in JS with no dependencies

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

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

Convert base64/datauri/plain string to ArrayBuffer

compare two collections

A BBCode to AST Parser part of @bbob

Randomize the order of items in an array

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

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

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

Count leading zeros in a Buffer (clz)

flatten() utility function

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.

Check if an object is an array or a typed array

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

Set of (possibly rotated) arrays

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

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

Convert an array to a csv formatted string

find all combinations from array

Run promise-returning & async functions in series

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.

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

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

Convert any binary data to ArrayBuffer

Invoke getter/setter functions on array-like objects

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

List of US states and territories.

a map from arrays of values to values

dedupes an array

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

Detect which ES6 (ES2015 and above) features are available

Composite utilities (immutability, fp helpers)

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

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

Create a filled generic array.

Transforms nested values of complex objects

Returns `true` if a value exists in the given string, array or object.

Maximum length for a typed array.

Returns the first index at which a given element can be found.

return the number of bytes in a unicode string

Retrieves the value of a specified property from all elements in the collection.

Get the Depth of a Multi-Dimensional Array of Values

Memory-Aware Statistical Calculations

Check whether a value is empty or blank, includes string whitespace support

Shuffle Array based on a Seed

qsu is a utility library that contains useful and frequently used functions. Start with your preferred language and the modern development environment.

Create a zero-filled generic array.

Maximum unsigned 32-bit integer.

Test if a value is a collection.

Test if a value is an Int32Array.

Uint8ClampedArray.

Fun with Iterables

Multi-Dimensional Functions. Create, Query, and Transform Multi-Dimensional Data.

Easily create a normalized inquirer choices question. Supports all of the `choices` question types: checkbox, list, rawlist, expand

Test if a value is an Int8Array.

Helper library for getting all of the states and territories of the United States in the specific format that you need.

Compute the cartesian product of an array.

Treat your $PATH like a JavaScript Array

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.

Sort the keys of an object recursively

Validates if a value is array-like.

Quickest Way to get the Minimum Value of an Array of Numbers (Typed or Untyped)

Create an object from from arrays of keys and values

Fuzzy match a command from a list (typo-safety)

Copy or deep clone a value to an arbitrary depth.

Check if a value is an array or a typed array

Array-map like function for objects.

Int8Array.

Transforms nested keys of complex objects

Int16Array.

Put non-empty strings into arrays, turn empty-ones into empty arrays. Bypass everything else.

Array#filter() with also detecting indexes of filtered values

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

write logs to js Array

Fast, generic JavaScript/node.js utility functions.

Quickest Way to get the Maximum Value of an Array of Numbers (Typed or Untyped)

Component-wise operations on ndarrays

common javascript utils that can be required selectively that assume es5+

List of prototype properties for JavaScript types

Get the Smallest and Largest Possible Numbers for a Typed Array

HashMap Class for JavaScript

short-circuited, asynchronous version of Array.protototype.some

Return the first index at which a given element can be found.

Get or set a deep value using a keypath string. Supports bracket and dot notation

Computes array dimensions.

Int32Array.

Test if a value is a Uint8ClampedArray.

Push items to an array at their correct sort-position

Test if a value is an Int16Array.

Perform data joins with any type of JS objects

Computes the Tversky index between two sequences.

Sort an array using the merge-sort algorithm.

A convenient way to return a JSX fragment without the wrapping `div` element and not worry about the version of React.

Vertex array object wrapper/shim for WebGL

WebGL buffer wrapper

Find the index to insert an element in array keeping the sort order.