JSPM

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Microsoft sucks

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.

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

Concatenate a readable stream's data into a single array

ES spec-compliant shim for TypedArray.prototype.slice

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

List of Markdown file extensions

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

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

Run an array of functions in series

Array#filter for older browsers.

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

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

Get the last or last n elements in an array.

Validates if a value is an array.

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

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

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

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

Validates if a value is an integer array.

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

Faster alternative to javascript's native filter method.

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.

Computes the greatest common divisor (gcd).

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

make a shallow copy of an object or array

Computes the least common multiple (lcm).

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

filter in array tree

Treat multiple buffers as one

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

Sort array elements in descending order.

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

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.

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)

`[].reduce()` for old browsers

Multidimensional Arrays

Microsoft sucks

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".

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

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.

Test if a value is a Float64Array.

Test if a value is an array.

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

Reuse typed arrays

Test if a value is a Uint32Array.

Sort an array on an object property

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

Float32Array.

Maximum unsigned 32-bit integer.

Float64Array.

Return a data type from a string representing the type

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

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Packs an array-of-arrays into a single ndarray

Deep-merge the values of one object structure into another

Test if a value is a Float32Array.

Initialize an array of arrays to a constant

Uint32Array.

Uint16Array.

List of getter/setter properties for JavaScript types

Find [nd-]array min/max values

Rotate all items in an array

creates a new array with given range

Rearrange array elements by index array

flattens nested vertex data into a typed array

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

Simple iterator for flat and multi section lists

Move an array item to a different position

Convert Buffer to ArrayBuffer

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

List of properties for JavaScript objects

List of JavaScript types

Deep copy objects and arrays

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

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.

The swiss army knife for binary data in JavaScript.

Rotate an array by a given number of steps

Array / Arraylike utilities

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

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.

Chai plugin for JSON Schema v4

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

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

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.

Functional tree editing, manipulation & navigation

Return true if the given number is even.

Extensible deep value equivalence checking for any data types

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

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

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.

Lazily initialized properties for objects

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.

Recursively iterates over arrays and objects

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

Flatten a nested array.

Sort string index ranges

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

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

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

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

Module for working with CIDR (v4, v6)

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

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

recursive object extending & overriding

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

A utility function to index arrays by any criteria

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.

Returns an array filled with the specified input

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

Asynchronous iterator function for parallel processing.

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

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.

Check if the given value is an Array

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.

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.'

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

Create an error from an array of error messages

Execute a method out from an object.

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

remove items from a javascript array without generating memory garbage

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

Get consecutively unique elements from an array

create a new array filled with a value, or zero

Find the intersection of two arrays

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

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

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

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

Group array of objects into lists.

A map function that can map over almost anything.

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

Uppercase first character of each element in arrays of strings.

Collection of image extensions

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.

Sparse array implementation in JS with no dependencies

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

Bind data arrays to any type of JS objects

Convert Gitignore to Glob patterns

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!

Convert base64/datauri/plain string to ArrayBuffer

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

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

compare two collections

Count leading zeros in a Buffer (clz)

A BBCode to AST Parser part of @bbob

flatten() utility function

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

Randomize the order of items in an array

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

Run promise-returning & async functions in series

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

Prettier plugin to force all arrays to be multiline.

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

Check if an object is an array or a typed array

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

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

find all combinations from array

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

Invoke getter/setter functions on array-like objects

Convert any binary data to ArrayBuffer

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

a map from arrays of values to values

List of US states and territories.

Detect which ES6 (ES2015 and above) features are available

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

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

Simple command line parser for node

Maximum length for a typed array.

dedupes an array

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

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

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

Create a filled generic array.

Transforms nested values of complex objects

Composite utilities (immutability, fp helpers)

Maximum unsigned 32-bit integer.

Shuffle Array based on a Seed

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

Create a zero-filled generic array.

Test if a value is a collection.

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

Get the Depth of a Multi-Dimensional Array of Values

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

Compute the cartesian product of an array.

Test if a value is an Int32Array.

Uint8ClampedArray.

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

Memory-Aware Statistical Calculations

return the number of bytes in a unicode string

Treat your $PATH like a JavaScript Array

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

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

HashMap Class for JavaScript

Copy or deep clone a value to an arbitrary depth.

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

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.

Int16Array.

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

Sort the keys of an object recursively

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

Test if a value is an Int8Array.

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

Validates if a value is array-like.

Create an object from from arrays of keys and values

Array-map like function for objects.

Check if a value is an array or a typed array

Fun with Iterables

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

Int8Array.

Fast, generic JavaScript/node.js utility functions.

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

Component-wise operations on ndarrays

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

write logs to js Array

Computes array dimensions.