JSPM

Computes the cosine similarity between two arrays.

Computes the cosine similarity between two vectors

Segregates values by similarity.

Segregates values by similarity.

Calculate the cosine distance between arrays

Calculates the similarity of 2 string arrays and sorts the seconds one by similarity to first

Get the first fulfilled promise that satisfies the provided testing function

Get the first path that exists on disk of multiple paths

Get the native type of a value.

Array#isArray for older browsers

Determines if an object can be used as an array

Tiny queue data structure

User-friendly glob matching

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Minimal async jobs utility library, with streams support

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Run an array of functions in parallel

Create an array of unique values, in order, from the input arrays

List of binary file extensions

Returns true if a value is a plain object, array or function.

Flatten nested arrays

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Robustly get the byte length of a Typed Array

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

Robustly get the byte offset of a Typed Array

Is this value a JS ArrayBuffer?

ES spec-compliant shim for ArrayBuffer.prototype.slice

Is this value a JS SharedArrayBuffer?

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

A list of SPDX license identifiers

A simple list of possible Typed Array names.

extend like a boss

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

Convert a value to an array

Robustly get the length of a Typed Array

Simply swizzle your arguments

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

Detect whether or not an object is a Typed Array

Array manipulation, ordering, searching, summarizing, etc.

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

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

TypedArray polyfill for old browsers

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Push an array of items into an array, while being robust against prototype modification

Creates a shallow clone of any JavaScript value.

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

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

Remove duplicate values from an array. Fastest ES5 implementation.

Parse postgres array columns

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.

a few common utility template tags for ES2015

Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.

A static list of the Node.js builtin modules from the latest Node.js version

Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.

Sort the keys of an object

Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.

Visit a method over the items in an object, or map visit over the objects in an array.

Create an array by repeating the given value n times.

Recursively flatten an array or arrays.

Create an array without duplicates

Map `visit` over an array of objects.

Utils for working with JavaScript classes and prototype methods.

Iterator abstraction based on ES6 specification

Get a compare function for array to sort

Check if a string matches the name of a Node.js builtin module

Isomorphic, functional type-checking for Javascript

Turn anything into an array

Guarantees an array back

No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.

Create an array with values that are present in the first input array but not additional ones

List of text file extensions

ES2015 `Array#findIndex()` ponyfill

Join paths and globs.

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

Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.

Array methods for ES6 Iterators

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

Like an array, but rounder.

Removes duplicates from a sorted array in place

Get the longest item in an array.

Loop over each item in an array and call the given function on every element.

Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Check if two arrays are equal

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Microsoft sucks

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

Return true if a value is a valid glob pattern or patterns.

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

Concatenate a readable stream's data into a single array

ES spec-compliant shim for TypedArray.prototype.slice

List of Markdown file extensions

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

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

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

Run an array of functions in series

Get the last or last n elements in an array.

Validates if a value is an array.

Array#filter for older browsers.

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

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

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

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

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

Validates if a value is an integer array.

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

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

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

An optionally-asynchronous forEach with an interesting interface.

Computes the least common multiple (lcm).

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.

make a shallow copy of an object or array

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

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.

Sort the keys in an object.

Sort array elements in ascending order.

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

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

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

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

Make any value an array. No dependencies.

Multidimensional Arrays

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

Microsoft sucks

Watch an object or array for changes

`[].reduce()` for old browsers

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".

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

Safely push each item of an array to a stream

Test if a value is a Float64Array.

Test if a value is an array.

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

Float32Array.

Reuse typed arrays

Test if a value is a Uint32Array.

Sort an array on an object property

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

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

Float64Array.

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

Return a data type from a string representing the type

Maximum unsigned 32-bit integer.

Uint8Array.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Test if a value is a Float32Array.

Packs an array-of-arrays into a single ndarray

Uint32Array.

Uint16Array.

Deep-merge the values of one object structure into another

Initialize an array of arrays to a constant

Rotate all items in an array

Find [nd-]array min/max values

List of getter/setter properties for JavaScript types

Rearrange array elements by index array

creates a new array with given range

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

Simple iterator for flat and multi section lists

Move an array item to a different position

flattens nested vertex data into a typed array

Convert Buffer to ArrayBuffer

Deep copy objects and 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

The swiss army knife for binary data in JavaScript.

Makes easy to convert JSON to CSV

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

Array / Arraylike utilities

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.

Rotate an array by a given number of steps

Creates a real Array from almost anything.

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

Computes the dot product between two numeric arrays.

Chai plugin for JSON Schema v4

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

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.

Extensible deep value equivalence checking for any data types

Return true if the given number is even.

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

Functional tree editing, manipulation & navigation

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

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.

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

Recursively iterates over arrays and objects

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.

Module for working with CIDR (v4, v6)

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.

List of common default router IP addresses

Lazily initialized properties for objects

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

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

Sort string index ranges

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

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

recursive object extending & overriding

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

Pipe an Array through Node.js streams

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.

Asynchronous iterator function for parallel processing.

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

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

Returns an array filled with the specified input

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.

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.

Execute a method out from an object.

Create an error from an array of error messages

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.

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.

remove items from a javascript array without generating memory garbage

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.

A map function that can map over almost anything.

List of video file extensions

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

Collection of image extensions

Group array of objects into lists.

Circular fixed size array

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.