JSPM

Turn anything into an array

Guarantees an array back

Isomorphic, functional type-checking for Javascript

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

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

List of text file extensions

ES2015 `Array#findIndex()` ponyfill

Join paths and globs.

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

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

Array methods for ES6 Iterators

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

Like an array, but rounder.

Removes duplicates from a sorted array in place

Get the longest item 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.

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Check if two arrays are equal

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

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

Microsoft sucks

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

Concatenate a readable stream's data into a single array

ES spec-compliant shim for TypedArray.prototype.slice

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

List of Markdown file extensions

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.

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

Run an array of functions in series

Validates if a value is an array.

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

Array#filter for older browsers.

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

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

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

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.

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

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).

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

Treat multiple buffers as one

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

Sort array elements in descending order.

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

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

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

[](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)

Make any value an array. No dependencies.

Multidimensional Arrays

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

Watch an object or array for changes

Microsoft sucks

`[].reduce()` for old browsers

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

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.

Sort an array on an object property

Test if a value is a Uint32Array.

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

Reuse typed arrays

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

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

Float64Array.

Return a data type from a string representing the type

Maximum unsigned 32-bit integer.

Uint8Array.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Test if a value is a Float32Array.

Packs an array-of-arrays into a single ndarray

Uint32Array.

Uint16Array.

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

Find [nd-]array min/max values

Rotate all items in an array

Rearrange array elements by index array

creates a new array with given range

List of getter/setter properties for JavaScript types

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

flattens nested vertex data into a typed array

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

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.

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

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

Creates a real Array from almost anything.

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two 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

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

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

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

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.

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

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)

Lazily initialized properties for objects

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.

A utility function to index arrays by any criteria

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

Sort string index ranges

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

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

recursive object extending & overriding

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.

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.

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.

create a new array filled with a value, or zero

Find the intersection of two arrays

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

remove items from a javascript array without generating memory garbage

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

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

A map function that can map over almost anything.

List of video file extensions

Uppercase first character of each element in arrays of strings.

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

Collection of image extensions

Group array of objects into lists.

Circular fixed size array

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

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

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 starts with prefix using strict equality for comparisons. Using fastest implementation.

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

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

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

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.

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.

Set of (possibly rotated) arrays

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

Run promise-returning & async functions in series

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

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

dedupes an array

Maximum length for a typed array.

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

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

Composite utilities (immutability, fp helpers)

Detect which ES6 (ES2015 and above) features are available

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

Create a filled generic array.

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

Transforms nested values of complex objects

Create a zero-filled generic array.

Maximum unsigned 32-bit integer.

Test if a value is a collection.

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

return the number of bytes in a unicode string

Compute the cartesian product of an array.

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

Shuffle Array based on a Seed

Sort the keys of an object recursively

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

Test if a value is an Int32Array.

Uint8ClampedArray.

Fun with Iterables

Int16Array.

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

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.

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

Treat your $PATH like a JavaScript Array

HashMap Class for JavaScript