JSPM

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.

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.

Array#filter for older browsers.

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.

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

Computes the greatest common divisor (gcd).

Computes the least common multiple (lcm).

Rotates values in array.

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

make a shallow copy of an object or array

An optionally-asynchronous forEach with an interesting interface.

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

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.

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

filter in array tree

Treat multiple buffers as one

Sort the keys in an object.

Sort array elements in descending order.

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)

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

Make any value an array. No dependencies.

Microsoft sucks

Multidimensional Arrays

Watch an object or array for changes

Make array iteration easy when using async/await and Promises

`[].reduce()` for old browsers

Generates an array of consecutive integers starting at 0

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.

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

Reuse typed arrays

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

Float64Array.

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

Safely push each item of an array to a stream

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Test if a value is a Float64Array.

Float32Array.

Sort an array on an object property

Test if a value is a Uint32Array.

Maximum unsigned 32-bit integer.

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

Uint32Array.

Uint16Array.

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.

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

Rearrange array elements by index array

Convert Buffer to ArrayBuffer

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

Move an array item to a different position

Find [nd-]array min/max values

Simple iterator for flat and multi section lists

List of getter/setter properties for JavaScript types

flattens nested vertex data into a typed array

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)

The swiss army knife for binary data in JavaScript.

Makes easy to convert JSON to CSV

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

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

Array / Arraylike utilities

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.

Creates a real Array from almost anything.

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

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

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.

Return true if the given number is even.

Functional tree editing, manipulation & navigation

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

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

Recursively iterates over arrays and objects

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

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

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 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.

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

Module for working with CIDR (v4, v6)

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

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

List of common default router IP addresses

Flatten a nested array.

A utility function to index arrays by any criteria

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

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.

Sort string index ranges

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

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

Lazily initialized properties for objects

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

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

Asynchronous iterator function for parallel processing.

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

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.

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

Check if the given value is an Array

Fast intersection of multiple arrays

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

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.'

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

Rotate array by n positions

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

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

Execute a method out from an object.

Create an error from an array of error messages

create a new array filled with a value, or zero

remove items from a javascript array without generating memory garbage

Get consecutively unique elements from an array

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

Find the intersection of two arrays

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

Uppercase first character of each element in arrays of strings.

A map function that can map over almost anything.

Convert Gitignore to Glob patterns

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

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

List of video file extensions

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

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.

Collection of image extensions

Bind data arrays to any type of JS objects

Circular fixed size array

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

Group array of objects into lists.

Sparse array implementation in JS with no dependencies

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

Randomize the order of items in an array

Rotate a data array

Convert base64/datauri/plain string to ArrayBuffer

A BBCode to AST Parser part of @bbob

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.

Count leading zeros in a Buffer (clz)

Check if an object is an array or a typed array

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

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.

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

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.

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

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

List of US states and territories.

Convert any binary data to ArrayBuffer

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

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

a map from arrays of values to values

Run promise-returning & async functions in series

dedupes an array

Composite utilities (immutability, fp helpers)

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

Create a filled generic array.

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

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

Maximum length for a typed array.

Get the Depth of a Multi-Dimensional Array of Values

Transforms nested values of complex objects

return the number of bytes in a unicode string

Memory-Aware Statistical Calculations

Invoke getter/setter functions on array-like objects

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

Detect which ES6 (ES2015 and above) features are available

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

Fun with Iterables

Test if a value is a collection.

Test if a value is an Int32Array.

Create a zero-filled generic array.

Uint8ClampedArray.

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

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

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

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

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

Shuffle Array based on a Seed

Maximum unsigned 32-bit integer.

Sort the keys of an object recursively

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

Create an object from from arrays of keys and values

Compute the cartesian product of an array.

Transforms nested keys of complex objects

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.

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

Int8Array.

Int16Array.

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

write logs to js Array

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

Array-map like function for objects.

HashMap Class for JavaScript

Test if a value is an Int8Array.

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

Validates if a value is array-like.

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

Check if a value is an array or a typed array

List of prototype properties for JavaScript types

Get the Smallest and Largest Possible Numbers for a Typed Array

Fast, generic JavaScript/node.js utility functions.

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

Component-wise operations on ndarrays

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

Copy or deep clone a value to an arbitrary depth.

Sort an array using the merge-sort algorithm.

Sorts ndarrays in place

Test if a value is an Int16Array.

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

Perform data joins with any type of JS objects

Maximum length for a generic array.

Int32Array.

Test if a value is a Uint8ClampedArray.

Computes array dimensions.

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