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

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`

Determines if an object can be used as an array

Tiny queue data structure

User-friendly glob matching

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.

Run an array of functions in parallel

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

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.

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

Robustly get the byte length of a Typed Array

Is this value a JS ArrayBuffer?

Is this value a JS SharedArrayBuffer?

Robustly get the byte offset of a Typed Array

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

ES spec-compliant shim for ArrayBuffer.prototype.slice

extend like a boss

A simple list of possible Typed Array names.

A list of SPDX license identifiers

Robustly get the length of a Typed Array

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

Convert a value to an array

Detect whether or not an object is a Typed Array

Simply swizzle your arguments

An ESnext spec-compliant `Object.groupBy` 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.

Array manipulation, ordering, searching, summarizing, etc.

TypedArray polyfill for old browsers

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

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

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

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

Creates a shallow clone of any JavaScript value.

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.

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

Parse postgres array columns

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

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

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

a few common utility template tags for ES2015

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.

Map `visit` over an array of objects.

Create an array without duplicates

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

Turn anything into an array

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

Guarantees an array back

List of text file extensions

Isomorphic, functional type-checking for Javascript

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

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

ES2015 `Array#findIndex()` ponyfill

Join paths and globs.

Removes duplicates from a sorted array in place

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

Array methods for ES6 Iterators

Like an array, but rounder.

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

Get the longest item in an array.

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

Check if two arrays are equal

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

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

Replace or remove multiple items in an array.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Microsoft sucks

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

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

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

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

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

List of Markdown file extensions

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

Array#filter for older browsers.

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

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

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

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

Validates if a value is an array.

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.

Faster alternative to javascript's native filter method.

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.

Computes the greatest common divisor (gcd).

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

make a shallow copy of an object or array

Computes the least common multiple (lcm).

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

filter in array tree

Treat multiple buffers as one

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

Sort array elements in descending order.

Sort the keys in an object.

Sort array elements in ascending order.

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

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)

`[].reduce()` for old browsers

Make any value an array. No dependencies.

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

Multidimensional Arrays

Microsoft sucks

Watch an object or array for changes

Generates an array of consecutive integers starting at 0

Make array iteration easy when using async/await and Promises

Check whether a value is "empty".

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

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 an array.

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

Test if a value is a Float64Array.

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).

Float32Array.

Maximum unsigned 32-bit integer.

Float64Array.

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

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Uint8Array.

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

List of getter/setter properties for JavaScript types

Find [nd-]array min/max values

Rotate all items in an array

creates a new array with given range

Rearrange array elements by index array

flattens nested vertex data into a typed array

Simple iterator for flat and multi section lists

Move an array item to a different position

Convert Buffer to ArrayBuffer

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

List of properties for JavaScript objects

List of JavaScript types

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)

The swiss army knife for binary data in JavaScript.

Makes easy to convert JSON to CSV

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

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

Array / Arraylike utilities

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.

Chai plugin for JSON Schema v4

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

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

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.

Extensible deep value equivalence checking for any data types

Functional tree editing, manipulation & navigation

Computes the dot product between two numeric arrays.

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.

Recursively iterates over arrays and objects

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.

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

Lazily initialized properties for objects

Flatten a nested array.

Sort string index ranges

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

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.

List of common default router IP addresses

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

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

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

recursive object extending & overriding

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

Pipe an Array through Node.js streams

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

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.

Returns an array filled with the specified input

Asynchronous iterator function for parallel processing.

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

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.

Fast intersection of multiple arrays

Check if the given value is an Array

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.

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

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.

remove items from a javascript array without generating memory garbage

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

Get consecutively unique elements from an array

Find the intersection of two arrays

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

create a new array filled with a value, or zero

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

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

Group array of objects into lists.

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

A map function that can map over almost anything.

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

Collection of image extensions

Uppercase first character of each element in arrays of strings.

Circular fixed size array

List of video file extensions

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.