JSPM

Microsoft sucks

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

ES spec-compliant shim for TypedArray.prototype.slice

Concatenate a readable stream's data into a single array

List of Markdown file extensions

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

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

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

Run an array of functions in series

No-bullshit super-simple es7 collections shim for Array#includes, Object.values, Object.entries

Get the last or last n elements in an array.

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

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

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

Validates if a value is an array.

Array#filter for older browsers.

Validates if a value is an integer array.

A order-map collection in the form of key, value, that ensures the index.

Run an array of functions in parallel, but limit the number of tasks executing at the same time

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

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

A Node-RED node to copy array data obtained from influxdb out node and display it on FlowFuse Dashboard 2.0

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

Computes the least common multiple (lcm).

An optionally-asynchronous forEach with an interesting interface.

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.

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

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

filter in array tree

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

Treat multiple buffers as one

Sort array elements in descending order.

Convert a string to utf8 byte array or vice versa.

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

Sort the keys in an object.

Sort array elements in ascending order.

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

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

[](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)

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

Make any value an array. No dependencies.

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

Multidimensional Arrays

Microsoft sucks

`[].reduce()` for old browsers

Watch an object or array for changes

Make array iteration easy when using async/await and Promises

Generates an array of consecutive integers starting at 0

Check whether a value is "empty".

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

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

Test if a value is an array.

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

Reuse typed arrays

Float64Array.

Test if a value is a Float64Array.

Float32Array.

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

Safely push each item of an array to a stream

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

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

Sort an array on an object property

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

Test if a value is a Uint32Array.

Maximum unsigned 32-bit integer.

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Return a data type from a string representing the type

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Uint32Array.

Uint16Array.

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

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

Rotate all items in an array

creates a new array with given range

Rearrange array elements by index array

Find [nd-]array min/max values

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

Simple iterator for flat and multi section lists

List of getter/setter properties for JavaScript types

Convert Buffer to ArrayBuffer

Move an array item to a different position

flattens nested vertex data into a typed array

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

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.

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

Rotate an array by a given number of steps

Shuffle and unshuffle an array by seed/key.

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.

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

Array / Arraylike utilities

Chai plugin for JSON Schema v4

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

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.

Functional tree editing, manipulation & navigation

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.

Recursively iterates over arrays and objects

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

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.

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.

List of common default router IP addresses

Flatten a nested array.

Module for working with CIDR (v4, v6)

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

A utility function to index arrays by any criteria

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

recursive object extending & overriding

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

Lazily initialized properties for objects

Sort string index ranges

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

Removes specified values from the end of an array.

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

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

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Asynchronous iterator function for parallel processing.

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.

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

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

Pipe an Array through Node.js streams

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

Immutable Array.prototype.copyWithin().

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

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

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.

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

Execute a method out from an object.

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

Create an error from an array of error messages

create a new array filled with a value, or zero

Get consecutively unique elements from an array

remove items from a javascript array without generating memory garbage

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

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

Find the intersection of two arrays

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

Return the shape of a provided ndarray.

Return the strides of a provided ndarray.

Uppercase first character of each element in arrays of strings.

A map function that can map over almost anything.

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

List of video file extensions

[![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 function for iterating over objects, arrays, strings and ranges

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

Collection of image extensions

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

Circular fixed size array

Convert Gitignore to Glob patterns

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

Bind data arrays to any type of JS objects

Group array of objects into lists.

Sparse array implementation in JS with no dependencies

Copies part of array within.

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

Convert base64/datauri/plain string to ArrayBuffer

Randomize the order of items in an array

A BBCode to AST Parser part of @bbob

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.

Count leading zeros in a Buffer (clz)

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

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

Set of (possibly rotated) arrays

Return a shallow copy of a portion of an array.

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

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.

Convert an array to a csv formatted string

find all combinations from array

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

Lots of utilities for Node.js

Convert any binary data to ArrayBuffer

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

Run promise-returning & async functions in series

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

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

dedupes an array

Detect which ES6 (ES2015 and above) features are available

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

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

Composite utilities (immutability, fp helpers)

Maximum length for a typed array.

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

return the number of bytes in a unicode string

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

Transforms nested values of complex objects

Copies part of array to another.

Get the Depth of a Multi-Dimensional Array of Values

Create a filled generic array.

Memory-Aware Statistical Calculations

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

Copies part of array to another.

Test if a value is a collection.

Maximum unsigned 32-bit integer.

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

Fun with Iterables

Create a zero-filled generic array.

Test if a value is an Int32Array.

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

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

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

Treat your $PATH like a JavaScript Array

Create an object from from arrays of keys and values

Validates if a value is array-like.

Transforms nested keys of complex objects

Int16Array.

Int8Array.

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