JSPM

creates a new array with given range

Rearrange array elements by index array

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

Find [nd-]array min/max values

Convert Buffer to ArrayBuffer

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

Simple iterator for flat and multi section lists

Move an array item to a different position

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

flattens nested vertex data into a typed array

List of getter/setter properties for JavaScript types

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

Copies missing properties to the target object.

List of properties for JavaScript objects

List of JavaScript types

Rotate an array by a given number of steps

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.

Makes easy to convert JSON to CSV

Shuffle and unshuffle an array by seed/key.

Array / Arraylike utilities

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

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

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 independent copy of a passed array

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

Computes the dot product between two numeric arrays.

Computes the cosine similarity between two arrays.

Extensible deep value equivalence checking for any data types

Creates a real Array from almost anything.

Functional tree editing, manipulation & navigation

Merge two lists, trying to preserve the order of both

Return true if the given number is even.

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

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.

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

Recursively iterates over arrays and objects

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

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.

List of common default router IP addresses

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

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

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

Module for working with CIDR (v4, v6)

Flatten a nested array.

A utility function to index arrays by any criteria

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

Removes specified values from the end of an array.

recursive object extending & overriding

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Create an immutable clone or copy of data. This could be an array, object, map, set or function.

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

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.

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

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

Lazily initialized properties for objects

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

Sort string index ranges

Asynchronous iterator function for parallel processing.

Parse dotenv files for Boolean, Array, and Number variable types, built for CrocodileJS

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

Check if the given value is an Array

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

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.

Immutable Array.prototype.copyWithin().

Pipe an Array through Node.js streams

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

Fast intersection of multiple arrays

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

Randomize the order of the elements in a given array.

Execute a method out from an object.

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.

Returns an array filled with the specified input

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

create a new array filled with a value, or zero

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

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

Return the shape of a provided ndarray.

Create an error from an array of error messages

List of video file extensions

Get consecutively unique elements from an array

Return the strides of a provided ndarray.

Convert Gitignore to Glob patterns

remove items from a javascript array without generating memory garbage

Find the intersection of two arrays

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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.

A map function that can map over almost anything.

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

Sort an object's keys, including an optional key list

Creates and makes an array without duplicates. Even with array of objects with a specified matcher.

Uppercase first character of each element in arrays of strings.

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

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

Collection of image extensions

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!

Bind data arrays to any type of JS objects

Circular fixed size array

Copies part of array within.

Group array of objects into lists.

A BBCode to AST Parser part of @bbob

Randomize the order of items in an array

Convert base64/datauri/plain string to ArrayBuffer

Count leading zeros in a Buffer (clz)

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

flatten() utility function

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

compare two collections

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

Check if an object is an array or a typed array

Return a shallow copy of a portion of an array.

Prettier plugin to force all arrays to be multiline.

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.

Set of (possibly rotated) arrays

Convert an array to a csv formatted string

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.

find all combinations from array

Lots of utilities for Node.js

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

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

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

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

Convert any binary data to ArrayBuffer

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

List of US states and territories.

Run promise-returning & async functions in series

dedupes an array

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.

Transforms nested values of complex objects

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

Copies part of array to another.

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

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).

return the number of bytes in a unicode string

Copies part of array to another.

Detect which ES6 (ES2015 and above) features are available

Invoke getter/setter functions on array-like objects

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

Get the Depth of a Multi-Dimensional Array of Values

Test if a value is a collection.

Memory-Aware Statistical Calculations

Create a filled generic array.

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

Test if a value is an Int32Array.

Uint8ClampedArray.

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

Array-map like function for objects.

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

Maximum unsigned 32-bit integer.

Compute the cartesian product of an array.

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

Fun with Iterables

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

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

Create a zero-filled generic array.

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

Int8Array.

Sort the keys of an object recursively

Int16Array.

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.

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

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

Transforms nested keys of complex objects

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Test if a value is an Int8Array.

Validates if a value is array-like.

HashMap Class for JavaScript

Check if a value is an array or a typed array

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

Create an object from from arrays of keys and values

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

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

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

Shuffle Array based on a Seed

Fast, generic JavaScript/node.js utility functions.

Component-wise operations on ndarrays

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

List of prototype properties for JavaScript types

Computes array dimensions.

write logs to js Array

Get the Smallest and Largest Possible Numbers for a Typed Array

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

Maximum length for a generic array.

Test if a value is a Uint8ClampedArray.

Int32Array.

Test if a value is an Int16Array.

Perform data joins with any type of JS objects

Sort an array using the merge-sort algorithm.

WebGL buffer wrapper

Type checking for JSON values

Treat your $PATH like a JavaScript Array

Get Pokémon names

Sorts ndarrays in place

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

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

Do not repeat anymore your objects transformations.

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

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

Generate a range array for numbers

return a grouped object from array

Vertex array object wrapper/shim for WebGL

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

Returns an element from an array when it matches a condition

Casts an array to an array of a different data type.

Component to iterate an array round robin.

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

Arrays.

Compare string arrays

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

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

Soft Asserts JSON, Array and other data

The swiss army knife for binary data in JavaScript.

Multidimensional arrays.

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

Converts iterable objects into readable streams.

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.

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

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

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

Convert ArrayBuffer to string

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

Like Array#indexOf but for objects used like hashes

Get a random item from an array

Calculates the Cartesian product between multiple collections.

Complex128Array.

Complex64Array.

Test if a value is an ArrayBuffer.

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

Reinterpret a Complex64Array as a Float32Array.

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

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

Add an object to an array between each element

Extended JS Map with Array-like methods

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

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

Get all chunks of a stream

Parse string into array of string elements

Functional tools for JS arrays

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

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

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

Convert ArrayBuffer to Buffer