JSPM

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

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

Get all but the last element or last n elements of an array.

Computes the least common multiple (lcm).

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

Faster, node.js focused alternative to JavaScript's native array map.

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.

An optionally-asynchronous forEach with an interesting interface.

Treat multiple buffers as one

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

filter in array tree

Convert a string to utf8 byte array or vice versa.

Sort array elements in descending order.

Sort the keys in an object.

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

Sort array elements in ascending order.

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Make any value an array. No dependencies.

Simple ES6 Array.prototype.findIndex polyfill for older environments.

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

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

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

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

Multidimensional Arrays

Microsoft sucks

Watch an object or array for changes

Make array iteration easy when using async/await and Promises

`[].reduce()` for old browsers

Generates an array of consecutive integers starting at 0

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

Check whether a value is "empty".

Maximum unsigned 32-bit integer.

Find the first element in an array that passes a callback test. Equivalent to underscore.find()

Test if a value is an array.

Return a function which tests if every element in an array passes a test condition.

Reuse typed arrays

Safely push each item of an array to a stream

Float64Array.

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

Sort an array on an object property

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

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

Test if a value is a Float64Array.

Float32Array.

Test if a value is a Uint32Array.

![Coverage badge gree][coverage-badge-green]

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

Return a data type from a string representing the type

Uint32Array.

Uint16Array.

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Deep-merge the values of one object structure into another

Given an array, shuffles a cloned copy, and returns it. (Fisher–Yates method)

Initialize an array of arrays to a constant

creates a new array with given range

Rotate all items in an array

Find [nd-]array min/max values

Rearrange array elements by index array

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

Convert Buffer to ArrayBuffer

Move an array item to a different position

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

Simple iterator for flat and multi section lists

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

List of getter/setter properties for JavaScript types

flattens nested vertex data into a typed array

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

List of properties for JavaScript objects

List of JavaScript types

Rotate an array by a given number of steps

Copies missing properties to the target object.

Makes easy to convert JSON to CSV

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.

Shuffle and unshuffle an array by seed/key.

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

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.

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

Array / Arraylike utilities

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

Creates a real Array from almost anything.

Returns independent copy of a passed array

Computes the dot product between two numeric arrays.

Functional tree editing, manipulation & navigation

Computes the cosine similarity between two arrays.

Chai plugin for JSON Schema v4

Extensible deep value equivalence checking for any data types

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.

Return true if the given number is even.

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

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.

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.

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

List of common default router IP addresses

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

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.

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.

recursive object extending & overriding

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

Removes specified values from the end of an array.

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url]

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]...]

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

Lazily initialized properties for objects

Check if the given value is an Array

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

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)

Asynchronous iterator function for parallel processing.

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.

Pipe an Array through Node.js streams

Immutable Array.prototype.copyWithin().

Fast intersection of multiple arrays

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

Randomize the order of the elements in a given array.

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

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

create a new array filled with a value, or zero

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

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

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

List of video file extensions

Return the shape of a provided ndarray.

remove items from a javascript array without generating memory garbage

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.

Return the strides of a provided ndarray.

Find the intersection of two arrays

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

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

Convert Gitignore to Glob patterns

Uppercase first character of each element in arrays of strings.

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-im

A map function that can map over almost anything.

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

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

Sparse array implementation in JS with no dependencies

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

Collection of image extensions

Bind data arrays to any type of JS objects

Circular fixed size array

Blazing fast, tree-shakeable, type-safe, modern utility library to sort any type of array in less than 1 KB!

Group array of objects into lists.

Copies part of array within.

A BBCode to AST Parser part of @bbob

Randomize the order of items in an array

Count leading zeros in a Buffer (clz)

Convert base64/datauri/plain string to ArrayBuffer

flatten() utility function

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.

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

Set of (possibly rotated) arrays

Return a shallow copy of a portion of an 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.

Convert an array to a csv formatted string

find all combinations from array

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

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.

Lots of utilities for Node.js

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

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.

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

Run promise-returning & async functions in series

a map from arrays of values to values

dedupes an array

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]]`.

Maximum length for a typed array.

Composite utilities (immutability, fp helpers)

Get the Depth of a Multi-Dimensional Array of Values

Create a filled generic array.

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

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

Memory-Aware Statistical Calculations

Copies part of array to another.

return the number of bytes in a unicode string

Detect which ES6 (ES2015 and above) features are available

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

Invoke getter/setter functions on array-like objects

Copies part of array to another.

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

Test if a value is a collection.

Create a zero-filled generic array.

Fun with Iterables

Array-map like function for objects.

Test if a value is an Int32Array.

Uint8ClampedArray.

Maximum unsigned 32-bit integer.

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

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

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

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

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

Sort the keys of an object recursively

Shuffle Array based on a Seed

Compute the cartesian product of an array.

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

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

Create an object from from arrays of keys and values

Int16Array.

Transforms nested keys of complex objects

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.

HashMap Class for JavaScript

Int8Array.

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

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

write logs to js Array

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

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-im

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

Validates if a value is array-like.

Test if a value is an Int8Array.

Computes array dimensions.

Get the Smallest and Largest Possible Numbers for a Typed Array

Fast, generic JavaScript/node.js utility functions.

Check if a value is an array or a typed array

List of prototype properties for JavaScript types

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

Component-wise operations on ndarrays

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

Sort an array using the merge-sort algorithm.

Type checking for JSON values