JSPM

Recursively filters collection values (arrays and objects)

Middleware for [express][] that filters IPs against glob patterns, RegExp, string or array of globs. Support custom `403 Forbidden` message, blacklists, whitelists and custom ID.

simple array filters for es6

Composable filters for arrays in TypeScript

multiple array utils, filters, shuffle, sort, etc

Filters an array of objects with filters defined in an object.

Function that filters undefined items from an array.

Reduce an array to a flat array based on custom filters.

Get the first fulfilled promise that satisfies the provided testing function

Get the first path that exists on disk of multiple paths

Array#isArray for older browsers

Tiny queue data structure

Middleware for [koa][] that filters IPs against glob patterns, RegExp, string or array of globs. Support custom `403 Forbidden` message and custom ID.

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.

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`

Run an array of functions in parallel

Get the native type of a value.

Minimal async jobs utility library, with streams support

Determines if an object can be used as an array

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

List of binary file extensions

Array manipulation, ordering, searching, summarizing, etc.

User-friendly glob matching

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.

Is this value a JS ArrayBuffer?

Robustly get the byte offset of a Typed Array

Robustly get the byte length of a Typed Array

ES spec-compliant shim for ArrayBuffer.prototype.slice

A simple list of possible Typed Array names.

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

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

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

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

Is this value a JS SharedArrayBuffer?

Robustly get the length of a Typed Array

extend like a boss

Flatten nested arrays

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

Parse postgres array columns

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

A list of SPDX license identifiers

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

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

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

Convert a value to an array

TypedArray polyfill for old browsers

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

Detect whether or not an object is a Typed Array

Creates a shallow clone of any JavaScript value.

a few common utility template tags for ES2015

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

Simply swizzle your arguments

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

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

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

Sort the keys of an object

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

Guarantees an array back

Remove duplicate values from an array. Fastest ES5 implementation.

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

Get a compare function for array to sort

Iterator abstraction based on ES6 specification

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

Turn anything into an array

Array methods for ES6 Iterators

Isomorphic, functional type-checking for Javascript

Utils for working with JavaScript classes and prototype methods.

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.

Map `visit` over an array of objects.

Recursively flatten an array or arrays.

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

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

Join paths and globs.

Create an array without duplicates

List of text file extensions

ES2015 `Array#findIndex()` ponyfill

Replace or remove multiple items in an array.

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

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.

List of Markdown file extensions

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

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

Concatenate a readable stream's data into a single array

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

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

Removes duplicates from a sorted array in place

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

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

Typescript-compatible minimalistic shallow equality check for arrays/objects

Get the longest item in an array.

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

Like an array, but rounder.

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

A utility library which filters objects from an array of objects based on a set of filter conditions

Microsoft sucks

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

Check if two arrays are equal

Validates if a value is an array.

ES spec-compliant shim for TypedArray.prototype.slice

Filters an array of objects by matching a field's value in each object to a search term. Returns filtered array

Sort the keys in an object.

Run an array of functions in series

Sort array elements in descending order.

Filters array by removing matching elements contained in one or more additional arrays.

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

Sort array elements in ascending order.

Computes the greatest common divisor (gcd).

Computes the least common multiple (lcm).

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

Watch an object or array for changes

Validates if a value is an integer array.

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

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

> A powerful React hook for managing client-side paginated data with filters, automatic refetching, and built-in loading states

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.

Make any value an array. No dependencies.

Treat multiple buffers as one

Multidimensional Arrays

make a shallow copy of an object or array

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

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

Faster alternative to javascript's native filter method.

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

Generates an array of consecutive integers starting at 0

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

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

Get the last or last n elements in an array.

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.

Array#filter for older browsers.

filter in array tree

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

Do dataset joins, mergings, filters, mappings, orderings, groupings, mergings, reducings (aggregations), and similar operations on datast style objects. A 'Dataset' is an array of objects with named properties. Inspired by c# linq method syntax.

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

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

Check whether a value is "empty".

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

Float64Array.

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

Return a data type from a string representing the type

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

Test if a value is a Uint8Array.

Uint8Array.

A utility function to index arrays by any criteria

Float32Array.

Test if a value is an array.

Test if a value is a Uint16Array.

Test if a value is a Float64Array.

An optionally-asynchronous forEach with an interesting interface.

Test if a value is a Uint32Array.

Safely push each item of an array to a stream

Reuse typed arrays

Maximum unsigned 32-bit integer.

Microsoft sucks

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

Sort an array on an object property

Uint32Array.

Uint16Array.

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

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

creates a new array with given range

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

Find [nd-]array min/max values

Test if a value is a Float32Array.

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

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

Initialize an array of arrays to a constant

A lightweight and simple TypeScript package to help filter arrays. Provides intelityping for filtering to help with code completions and prevent errors. Increases the readability of code when using multiple filters.

flattens nested vertex data into a typed array

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

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

Deep-merge the values of one object structure into another

Deep copy objects and arrays

Computes the cosine similarity between two arrays.

Computes the dot product between two numeric arrays.

`[].reduce()` for old browsers

Packs an array-of-arrays into a single ndarray

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

Return true if the given number is even.

Filters object in a way the MongoDB does. Filters are defined as an array of dot separated paths. Filtering in arrays included.

Simple iterator for flat and multi section lists

Make array iteration easy when using async/await and Promises

Randomize the order of the elements in a given array.

Move an array item to a different position

Bind data arrays to any type of JS objects

Rearrange array elements by index array

Convert Buffer to ArrayBuffer

Typedarray integer & float pixel buffers w/ customizable formats, blitting, drawing, convolution

Flatten a nested array.

The swiss army knife for binary data in JavaScript.

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

Extensible deep value equivalence checking for any data types

An ES-spec-compliant (proposed) Array.prototype.at shim/polyfill/replacement that works as far down as ES3

Makes easy to convert JSON to CSV

Recursively iterates over arrays and objects

A fast implementation of a fisher-yates shuffle that does not mutate the source array.

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

Asynchronous iterator function for parallel processing.

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

List of getter/setter properties for JavaScript types

Rotate an array by a given number of steps

Merge two lists, trying to preserve the order of both

Array / Arraylike utilities

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

Functional tree editing, manipulation & navigation

List of properties for JavaScript objects

Sort string index ranges

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

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

Rotate all items in an array

List of JavaScript types

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

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

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

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

Creates a real Array from almost anything.

Pipe an Array through Node.js streams

Create a filled generic array.

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

Create a zero-filled generic array.

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.

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

Filters an array by testing uniqueness with a callback, an index, or a key.

Module for working with CIDR (v4, v6)

取得陣列唯一值，支援深度比較巢狀物件和陣列 / Get unique values from array with deep comparison for nested objects and 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.

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

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

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.

split an array ( or object) into multiple using filters

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

Check if the given value is an Array

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

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

List of video file extensions

List of common default router IP addresses

Collection of image extensions

Sparse array implementation in JS with no dependencies

Lazily initialized properties for objects

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.

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

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

compare two collections

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.

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

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