JSPM

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

Array / Arraylike utilities

Rotate an array by a given number of steps

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

Creates a real Array from almost anything.

Computes the dot product between two numeric 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

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.

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

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

Recursively iterates over arrays and objects

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

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.

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

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.

Module for working with CIDR (v4, v6)

List of common default router IP addresses

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

Lazily initialized properties for objects

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

recursive object extending & overriding

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

Sort string index ranges

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

Asynchronous iterator function for parallel processing.

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

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

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.

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

Fast intersection of multiple arrays

Randomize the order of the elements in a given array.

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

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.'

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

Create an error from an array of error messages

Execute a method out from an object.

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

remove items from a javascript array without generating memory garbage

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

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

Find the intersection of two arrays

Uppercase first character of each element in arrays of strings.

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

A map function that can map over almost anything.

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

Collection of image extensions

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

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.

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

Bind data arrays to any type of JS objects

Group array of objects into lists.

Convert Gitignore to Glob patterns

Sparse array implementation in JS with no dependencies

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!

Randomize the order of items in 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

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

A BBCode to AST Parser part of @bbob

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

Check if an object is an array or a typed array

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.

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.

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

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

Convert any binary data to ArrayBuffer

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

List of US states and territories.

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

a map from arrays of values to values

Invoke getter/setter functions on array-like objects

dedupes an array

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

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

Detect which ES6 (ES2015 and above) features are available

Composite utilities (immutability, fp helpers)

Maximum length for a typed array.

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

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

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

Create a filled generic array.

Get the Depth of a Multi-Dimensional Array of Values

return the number of bytes in a unicode string

Memory-Aware Statistical Calculations

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

Transforms nested values of complex objects

Test if a value is a collection.

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

Maximum unsigned 32-bit integer.

Fun with Iterables

Test if a value is an Int32Array.

Create a zero-filled generic array.

Uint8ClampedArray.

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

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

Shuffle Array based on a Seed

Compute the cartesian product of an array.

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

Sort the keys of an object recursively

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

Validates if a value is array-like.

Int16Array.

Treat your $PATH like a JavaScript Array

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

Test if a value is an Int8Array.

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

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)

Transforms nested keys of complex objects

HashMap Class for JavaScript

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

Int8Array.

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

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

Copy or deep clone a value to an arbitrary depth.

Array-map like function for objects.

Check if a value is an array or a typed array

Fast, generic JavaScript/node.js utility functions.

write logs to js Array

List of prototype properties for JavaScript types

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 the Smallest and Largest Possible Numbers for a Typed Array

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

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

Perform data joins with any type of JS objects

Sort an array using the merge-sort algorithm.

Computes the Tversky index between two sequences.

Computes array dimensions.

Int32Array.

Test if a value is a Uint8ClampedArray.

Test if a value is an Int16Array.

Push items to an array at their correct sort-position

Sorts ndarrays in place

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

WebGL buffer wrapper

Maximum length for a generic array.

Vertex array object wrapper/shim for WebGL

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

Advance to the next item in the array looping when hitting the end.

Get the index of the first element in an array that returns truthy for the given value, using strict equality for comparisons.

Get Pokémon names

return a grouped object from array

Type checking for JSON values

Consumes a defaults object with booleans, generates all possible variations of it

Do not repeat anymore your objects transformations.

Array of "block level elements" defined by the HTML specification

Compare string arrays

Arrays.

Returns an element from an array when it matches a condition

Multidimensional arrays.

Determine the best order for running async functions, and run them

Generate a range array for numbers

Converts iterable objects into readable streams.

Component to iterate an array round robin.

Ensure a value is an array and wrap it if it is not an array

Copy or deep clone a value to an arbitrary depth.

Remove circular references from objects

Soft Asserts JSON, Array and other data

Returns true if the callback returns truthy for all elements in the given array.

Return an array with the unique values present in _all_ given arrays using strict equality for comparisons.

Convert a string to utf8 byte array or vice versa.

Iterates over the elements in an array, returning an array with only the elements for which the callback returns truthy.

Convert ArrayBuffer to string

A tiny JavaScript library for converting arrays of strings to compound subjects

Checks if the given value is an array or array-like object.

Big Array object that allows to handle arrays with a huge number of elements.

Fixes key names for HTTP form data, to ensure that arrays are handled correctly.

A [Chai](http://chaijs.com/) plugin that allows for assertions on each item in an array

Get a random item from an array

Complex64Array.

Test if a value is an ArrayBuffer.

Calculates the Cartesian product between multiple collections.

format multiline strings using tagged templates, instead of puting all lines into an array and joining to a string

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

Add an object to an array between each element

Complex128Array.

Reinterpret a Complex64Array as a Float32Array.

Extended JS Map with Array-like methods

Functional tools for JS arrays

Convert an 'address:port' string to an array [address:string, port:number]

The Type Conversion Library. Numbers, Strings, Arrays, Maps, Objects, and Iterators.

Like Array#indexOf but for objects used like hashes

Copies missing properties to the target object.

Save file dialog in browser, write file to disk in node

Convert a plain array of nodes (with pointers to parent nodes) to a tree

Given an array, pick a random element and return it.

Get all chunks of a stream

Uniquely flexible and light-weight utility for cloning and deep (recursive) merging of JavaScript objects. Supports descriptor values, accessor functions, and custom prototypes. Provides advanced options for customizing the clone/merge process.

Parse string into array of string elements

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

Convert an array-like object to an object likely to have the same "shape".

Test if a value is an array-like object.

Reinterpret a Complex128Array as a Float64Array.

🐊Putout plugin adds ability to convert array copy to slice

Convert ArrayBuffer to Buffer

A lightweight javascript diff library for comparing two javascript object nested with supporting matching by value of the object's choosen key name in array.

Test if a value is array-like.

Filter array elements with Promises

Decode the frames of a gif.

🐊Putout plugin adds ability to convert anonymous to arrow function

🐊Putout plugin adds ability to remove useless Array constructor

Return a JSON representation of a typed array.

Sort objects and arrays of objects nested deeply within other objects or arrays

Return the data type of an array.

returns an array of grouped elements, taking n-th element from every given array

Extract javascript comments on per character basis. Comment object compatible with `acorn-extract-comments` and Esprima format.

Test if a value is a typed array.

Copy values from x into y.

Test if a value is a complex typed array.

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

Return an accessor function for setting an element in an indexed array-like object.

Transform all for-of loops into the equivalent array for loop

Produces a new array, sorted in ascending order

Frequent default values

Polyfill to provide array.find on IE.

A toolkit for deep structure manipulations, provides deep merge/clone functionality out of the box, and exposes hooks and custom adapters for more control and greater flexibility.