JSPM

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.

Flatten a nested array.

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

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

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]...]

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

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

Pipe an Array through Node.js streams

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.

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

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.

Check if the given value is an Array

Randomize the order of the elements in a given array.

Fast intersection of multiple arrays

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

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

remove items from a javascript array without generating memory garbage

create a new array filled with a value, or zero

Find the intersection of two arrays

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

Uppercase first character of each element in arrays of strings.

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

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

A map function that can map over almost anything.

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

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.

Collection of image extensions

Group array of objects into lists.

Circular fixed size array

Convert Gitignore to Glob patterns

Bind data arrays to any type of JS objects

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

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

Randomize the order of items in an array

compare two collections

A BBCode to AST Parser part of @bbob

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.

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

Check if an object is an array or a typed array

Prettier plugin to force all arrays to be multiline.

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

Works like String.prototype.replace but outputs an array. Useful for replacing parts of the string with objects of other types.

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.

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

List of US states and territories.

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.

Get the Depth of a Multi-Dimensional Array of Values

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

Create a filled generic array.

Memory-Aware Statistical Calculations

return the number of bytes in a unicode string

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.

Maximum unsigned 32-bit integer.

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

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.

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.

Fun with Iterables

Sort the keys of an object recursively

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

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

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.

HashMap Class for JavaScript

Transforms nested keys of complex objects

Create an object from from arrays of keys and values

Validates if a value is array-like.

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.

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.

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

Fast, generic JavaScript/node.js utility functions.

write logs to js Array

List of prototype properties for JavaScript types

Component-wise operations on ndarrays

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

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

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

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

Computes the Tversky index between two sequences.

Int32Array.

Test if a value is a Uint8ClampedArray.

Test if a value is an Int16Array.

Computes array dimensions.

Perform data joins with any type of JS objects

Push items to an array at their correct sort-position

Sort an array using the merge-sort algorithm.

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

Vertex array object wrapper/shim for WebGL

Maximum length for a generic array.

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 Pokémon names

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.

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

Type checking for JSON values

Do not repeat anymore your objects transformations.

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

Arrays.

Compare string arrays

Returns an element from an array when it matches a condition

Multidimensional arrays.

Component to iterate an array round robin.

Generate a range array for numbers

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

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

Converts iterable objects into readable streams.

Copy or deep clone a value to an arbitrary depth.

Remove circular references from objects

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.

Soft Asserts JSON, Array and other data

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

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

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.

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.

Extended JS Map with Array-like methods

Reinterpret a Complex64Array as a Float32Array.

Functional tools for JS arrays

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

Copies missing properties to the target object.

Like Array#indexOf but for objects used like hashes

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

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".

🐊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.

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.

Filter array elements with Promises

Decode the frames of a gif.

🐊Putout plugin adds ability to convert anonymous to arrow function

Test if a value is array-like.

🐊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

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.

Test if a value is a complex typed array.

Return the data type of an array.

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

Copy values from x into y.

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

Produces a new array, sorted in ascending order

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

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.

Check if an Array is sorted

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

Frequent default values

Polyfill to provide array.find on IE.

Compare two arrays of objects, finding added, removed, updated and identical objects. Details the differences between updated objects.

Return an accessor function for retrieving an element from an array-like object supporting the get/set protocol.

Test if an array-like object supports the accessor (get/set) protocol.

Test if a value is a Complex64Array.

Generate markdown table from array of objects

Return an accessor function for retrieving an element from an indexed array-like object.

Splits array into groups of n items each

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

Return an accessor function for setting an element in an array-like object supporting the get/set protocol.

Chained and parallel async iterator in one elegant function.

Like _.pullAll but with globs (wildcards)

easy deduplication of array values

Produces a new array, sorted in given order

Test if a value is a Complex128Array.

return a flattened array

Effectively merge arrays of objects into a single array by merging objects with the same key (property).

List of ndarray data types.

Cycle through the items of an array

Return early from reduce