JSPM

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

Treat multiple buffers as one

Sort the keys in an object.

Sort array elements in ascending order.

Sort array elements in descending order.

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

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

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

Make any value an array. No dependencies.

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

Multidimensional Arrays

`[].reduce()` for old browsers

Microsoft sucks

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".

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

Maximum unsigned 32-bit integer.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

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

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

Float64Array.

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

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

Sort an array on an object property

Test if a value is a Uint32Array.

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Return a data type from a string representing the type

Deep-merge the values of one object structure into another

Uint32Array.

Uint16Array.

Initialize an array of arrays to a constant

creates a new array with given range

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

Rotate all items in an array

Rearrange array elements by index array

Move an array item to a different position

List of getter/setter properties for JavaScript types

flattens nested vertex data into a typed array

Find [nd-]array min/max values

Convert Buffer to ArrayBuffer

Simple iterator for flat and multi section lists

List of properties for JavaScript objects

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

Deep copy objects and arrays

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

List of JavaScript types

The swiss army knife for binary data in JavaScript.

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.

Makes easy to convert JSON to CSV

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

Rotate an array by a given number of steps

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

Array / Arraylike utilities

Chai plugin for JSON Schema v4

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

Creates a real Array from almost anything.

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.

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

Functional tree editing, manipulation & navigation

Computes the dot product between two numeric arrays.

Return true if the given number is even.

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

Returns a copy of an object, sorted deeply by its keys, without mangling any arrays inside of it

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.

Recursively iterates over arrays and objects

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

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

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

List of common default router IP addresses

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

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.

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.

Sort string index ranges

Lazily initialized properties for objects

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

A utility function to index arrays by any criteria

recursive object extending & overriding

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

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

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.

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

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

Asynchronous iterator function for parallel processing.

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

Pipe an Array through Node.js streams

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

Check if the given value is an Array

Fast intersection of multiple arrays

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.

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.'

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

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.

Randomize the order of the elements in a given array.

Create an error from an array of error messages

Execute a method out from an object.

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

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

remove items from a javascript array without generating memory garbage

Find the intersection of two arrays

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

Get consecutively unique elements from an array

create a new array filled with a value, or zero

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

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

Group array of objects into lists.

A map function that can map over almost anything.

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

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

Uppercase first character of each element in arrays of strings.

List of video file extensions

Collection of image extensions

Circular fixed size array

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!

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.

compare two collections

Simple javascript lib for converting a [comma || space] delimited string to an array

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

A BBCode to AST Parser part of @bbob

Convert base64/datauri/plain string to ArrayBuffer

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

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

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

Set of (possibly rotated) arrays

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

Convert an array to a csv formatted string

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

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.

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

find all combinations from array

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.

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.

Detect which ES6 (ES2015 and above) features are available

a map from arrays of values to values

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

dedupes an array

Invoke getter/setter functions on array-like objects

Create a filled generic array.

Transforms nested values of complex objects

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

Maximum length for a typed array.

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

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

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

Composite utilities (immutability, fp helpers)

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

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

Get the Depth of a Multi-Dimensional Array of Values

Create a zero-filled generic array.

Test if a value is an Int32Array.

Uint8ClampedArray.

Test if a value is a collection.

Memory-Aware Statistical Calculations

return the number of bytes in a unicode string

Maximum unsigned 32-bit integer.

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.

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.

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

Sort the keys of an object recursively

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

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

Copy or deep clone a value to an arbitrary depth.

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

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

Compute the cartesian product of an array.

Array-map like function for objects.

Test if a value is an Int8Array.

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

Int16Array.

Transforms nested keys of complex objects

Treat your $PATH like a JavaScript Array

Fast, generic JavaScript/node.js utility functions.

Fun with Iterables

Validates if a value is array-like.

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

Int8Array.

Create an object from from arrays of keys and values

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

Component-wise operations on ndarrays

write logs to js Array

Check if a value is an array or a typed array

HashMap Class for JavaScript

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

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

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

Get the Smallest and Largest Possible Numbers for a Typed Array

Test if a value is an Int16Array.

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

Computes array dimensions.

Maximum length for a generic array.

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

Computes the Tversky index between two sequences.

Int32Array.

Sorts ndarrays in place

Perform data joins with any type of JS objects

Test if a value is a Uint8ClampedArray.

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

Push items to an array at their correct sort-position

WebGL buffer wrapper

List of prototype properties for JavaScript types

Get Pokémon names

Vertex array object wrapper/shim for WebGL

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

Sort an array using the merge-sort algorithm.

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

Type checking for JSON values

Do not repeat anymore your objects transformations.

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

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

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

Functional tools for JS arrays

Generate a range array for numbers

Component to iterate an array round robin.

return a grouped object from array

Compare string arrays

Converts iterable objects into readable streams.

Returns an element from an array when it matches a condition

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

Multidimensional arrays.

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