JSPM

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

Get the longest item in an array.

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

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license

Replace or remove multiple items in an array.

Check if two arrays are equal

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.

ES spec-compliant shim for TypedArray.prototype.slice

Concatenate a readable stream's data into a single array

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

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

List of Markdown file extensions

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.

Get the last or last n elements in an array.

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.

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

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

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

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

Computes the least common multiple (lcm).

An optionally-asynchronous forEach with an interesting interface.

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.

Rotates values in array.

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.

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

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)

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

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

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

Make any value an array. No dependencies.

Microsoft sucks

Multidimensional Arrays

`[].reduce()` for old browsers

Make array iteration easy when using async/await and Promises

Watch an object or array for changes

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.

Test if a value is a Float64Array.

Reuse typed arrays

Float32Array.

Test if a value is a Uint32Array.

Float64Array.

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

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()

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

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.

Safely push each item of an array to a stream

Sort an array on an object property

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

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

flattens nested vertex data into a typed array

Simple iterator for flat and multi section lists

Deep copy objects and arrays

Move an array item to a different position

Convert Buffer to ArrayBuffer

List of properties for JavaScript objects

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

List of JavaScript types

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

Makes easy to convert JSON to CSV

The swiss army knife for binary data in JavaScript.

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.

Array / Arraylike utilities

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

Chai plugin for JSON Schema v4

Creates a real Array from almost anything.

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

Merge two lists, trying to preserve the order of both

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

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.

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

Functional tree editing, manipulation & navigation

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

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

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

Recursively iterates over arrays and objects

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

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

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

Flatten a nested array.

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

Module for working with CIDR (v4, v6)

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

List of common default router IP addresses

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

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

A utility function to index arrays by any criteria

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

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

Pipe an Array through Node.js streams

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

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)

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

Asynchronous iterator function for parallel processing.

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.

Returns an array filled with the specified input

Check if the given value is an Array

Randomize the order of the elements in a given array.

Fast intersection of multiple arrays

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.

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

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

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.

Rotate array by n positions

Find the intersection of two arrays

remove items from a javascript array without generating memory garbage

create a new array filled with a value, or zero

A map function that can map over almost anything.

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.

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

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.

List of video file extensions

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

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

Collection of image extensions

Circular fixed size array

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

Bind data arrays to any type of JS objects

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!

Convert base64/datauri/plain string to ArrayBuffer

Rotate a data array

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

compare two collections

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

A BBCode to AST Parser part of @bbob

Count leading zeros in a Buffer (clz)

flatten() utility function

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 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

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

Prettier plugin to force all arrays to be multiline.

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

Set of (possibly rotated) arrays

Check if an object is an array or a typed array

Run promise-returning & async functions in series

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

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

Convert any binary data to ArrayBuffer

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.

Invoke getter/setter functions on array-like objects

a map from arrays of values to values

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

dedupes an array

List of US states and territories.

Detect which ES6 (ES2015 and above) features are available

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

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

Create a filled generic array.

Composite utilities (immutability, fp helpers)

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

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

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

Transforms nested values of complex objects

return the number of bytes in a unicode string

Maximum length for a typed array.

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

Shuffle Array based on a Seed

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

Test if a value is an Int32Array.

Uint8ClampedArray.

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

Get the Depth of a Multi-Dimensional Array of Values

Create a zero-filled generic array.

Maximum unsigned 32-bit integer.

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

Test if a value is a collection.

Memory-Aware Statistical Calculations

Treat your $PATH like a JavaScript Array

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.

Compute the cartesian product of an array.

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

Sort the keys of an object recursively

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.

Int8Array.

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

Fun with Iterables

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

write logs to js Array

Check if a value is an array or a typed array

Copy or deep clone a value to an arbitrary depth.

Component-wise operations on ndarrays

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

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

Transforms nested keys of complex objects

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

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