@stdlib/utils-async NPM

Async

Async utilities.

Installation

npm install @stdlib/utils-async

Usage

var ns = require( '@stdlib/utils-async' );

ns

Namespace containing async utilities.

var o = ns;
// returns {...}

anyByRightAsync( collection, [options,] predicate, done ): test whether at least one element in a collection passes a test implemented by a predicate function, iterating from right to left.
anyByAsync( collection, [options,] predicate, done ): test whether at least one element in a collection passes a test implemented by a predicate function.
bifurcateByAsync( collection, [options,] predicate, done ): split values into two groups according to a predicate function.
composeAsync( ...fcn ): function composition.
countByAsync( collection, [options,] indicator, done ): group values according to an indicator function and return group counts.
doUntilAsync( fcn, predicate, done[, thisArg ] ): invoke a function until a test condition is true.
doWhileAsync( fcn, predicate, done[, thisArg ] ): invoke a function while a test condition is true.
everyByRightAsync( collection, [options,] predicate, done ): test whether all elements in a collection pass a test implemented by a predicate function, iterating from right to left.
everyByAsync( collection, [options,] predicate, done ): test whether all elements in a collection pass a test implemented by a predicate function.
forEachRightAsync( collection, [options,] fcn, done ): invoke a function once for each element in a collection, iterating from right to left.
forEachAsync( collection, [options,] fcn, done ): invoke a function once for each element in a collection.
functionSequenceAsync( ...fcn ): function sequence.
groupByAsync( collection, [options,] indicator, done ): group values according to an indicator function.
ifelseAsync( predicate, x, y, done ): if a predicate function returns a truthy value, return x; otherwise, return y.
ifthenAsync( predicate, x, y, done ): if a predicate function returns a truthy value, invoke x; otherwise, invoke y.
inmapRightAsync( collection, [options,] fcn, done ): invoke a function for each element in a collection and update the collection in-place, iterating from right to left.
inmapAsync( collection, [options,] fcn, done ): invoke a function for each element in a collection and update the collection in-place.
mapFunAsync( fcn, n, [options,] done ): invoke a function n times and return an array of accumulated function return values.
mapKeysAsync( obj, [options,] transform, done ): map keys from one object to a new object having the same values.
mapValuesAsync( obj, [options,] transform, done ): map values from one object to a new object having the same keys.
noneByRightAsync( collection, [options,] predicate, done ): test whether all elements in a collection fail a test implemented by a predicate function, iterating from right to left.
noneByAsync( collection, [options,] predicate, done ): test whether all elements in a collection fail a test implemented by a predicate function.
reduceRightAsync( collection, initial, [options,] reducer, done ): apply a function against an accumulator and each element in a collection and return the accumulated result, iterating from right to left.
reduceAsync( collection, initial, [options,] reducer, done ): apply a function against an accumulator and each element in a collection and return the accumulated result.
waterfall( fcns, clbk[, thisArg] ): execute functions in series, passing the results of one function as arguments to the next function.
someByRightAsync( collection, n, [options,] predicate, done ): test whether a collection contains at least n elements which pass a test implemented by a predicate function, iterating from right to left.
someByAsync( collection, n, [options,] predicate, done ): test whether a collection contains at least n elements which pass a test implemented by a predicate function.
tabulateByAsync( collection, [options,] indicator, done ): generate a frequency table according to an indicator function.
trycatchAsync( x, y, done ): if a function does not return an error, invoke a callback with the function result; otherwise, invoke a callback with a value y.
trythenAsync( x, y, done ): if a function does not return an error, invoke a callback with the function result; otherwise, invoke a second function.
untilAsync( predicate, fcn, done[, thisArg ] ): invoke a function until a test condition is true.
whileAsync( predicate, fcn, done[, thisArg ] ): invoke a function while a test condition is true.

Examples

var objectKeys = require( '@stdlib/utils-keys' );
var ns = require( '@stdlib/utils-async' );

console.log( objectKeys( ns ) );

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.