JSPM

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

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

Find [nd-]array min/max values

Simple iterator for flat and multi section lists

flattens nested vertex data into a typed array

Move an array item to a different position

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

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

Chai plugin for JSON Schema v4

Creates a real Array from almost anything.

Computes the dot product between two numeric 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

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

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.

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

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.

List of common default router IP addresses

Module for working with CIDR (v4, v6)

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

Sort string index ranges

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

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

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

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.

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

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.

create a new array filled with a value, or zero

Find the intersection of two arrays

remove items from a javascript array without generating memory garbage

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

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.

A map function that can map over almost anything.

List of video file extensions

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.

Collection of image extensions

Circular fixed size array

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

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

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

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` ends with `suffix` using strict equality for comparisons.

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

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

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

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

Set of (possibly rotated) arrays

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

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

Run promise-returning & async functions in series

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.

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

dedupes an 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).

Detect which ES6 (ES2015 and above) features are available

Composite utilities (immutability, fp helpers)

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

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

Create a filled generic array.

Transforms nested values of complex objects

Maximum length for a typed array.

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

return the number of bytes in a unicode string

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

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

Shuffle Array based on a Seed

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

Create a zero-filled generic array.

Maximum unsigned 32-bit integer.

Test if a value is a collection.

Test if a value is an Int32Array.

Uint8ClampedArray.

Fun with Iterables

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

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.

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

Compute the cartesian product of an array.

Treat your $PATH like a JavaScript Array

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.

Sort the keys of an object recursively

Validates if a value is array-like.

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

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

Copy or deep clone a value to an arbitrary depth.

Check if a value is an array or a typed array

Array-map like function for objects.

Int8Array.

Transforms nested keys of complex objects

Int16Array.

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

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

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

write logs to js Array

Component-wise operations on ndarrays

Fast, generic JavaScript/node.js utility functions.

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

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

List of prototype properties for JavaScript types

Get the Smallest and Largest Possible Numbers for a Typed Array

HashMap Class for JavaScript

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

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

Computes array dimensions.

Int32Array.

Push items to an array at their correct sort-position

Test if a value is a Uint8ClampedArray.

Test if a value is an Int16Array.

Perform data joins with any type of JS objects

Computes the Tversky index between two sequences.

Sort an array using the merge-sort algorithm.

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

Vertex array object wrapper/shim for WebGL

WebGL buffer wrapper

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

Maximum length for a generic array.

Sorts ndarrays in place

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

Get Pokémon names

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

Type checking for JSON values

return a grouped object from array

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

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

Do not repeat anymore your objects transformations.

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

Compare string arrays

Multidimensional arrays.

Returns an element from an array when it matches a condition

Arrays.

Generate a range array for numbers

Component to iterate an array round robin.

Converts iterable objects into readable streams.

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

Copy or deep clone a value to an arbitrary depth.

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

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

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

Soft Asserts JSON, Array and other data

Remove circular references from objects

Functional tools for JS arrays

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

Convert ArrayBuffer to string

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

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

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

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

Convert a string to utf8 byte array or vice versa.

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

Get a random item from an array

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

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

Complex128Array.

Extended JS Map with Array-like methods

Test if a value is an ArrayBuffer.

Complex64Array.

Add an object to an array between each element

Like Array#indexOf but for objects used like hashes

Reinterpret a Complex64Array as a Float32Array.

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

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

Get all chunks of a stream

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

Copies missing properties to the target object.

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

Parse string into array of string elements

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.

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".

🐊Putout plugin adds ability to convert array copy to slice

Convert ArrayBuffer to Buffer

Test if a value is an array-like object.

Reinterpret a Complex128Array as a Float64Array.

Test if a value is array-like.