node-array-ext

Extensions for nodejs arrays.

Installation:

npm install node-array-ext

TypeScript Definitions

tsd install node-array-ext

asyncEach(array, each, cb)

Description:

This method iterates through the elements of the array and triggers a callback after all of the elements have been processed.

- note that this method does not preserve order and allows elements to be processed asynchronously.

Params:

• array:
  • Array<T>
  • The array to process.
• each:
  • (i: number, element: T, done: (err?: Error) => void) => void
  • The method that will be called for each element.
• cb:
  • (err?: Error) => void
  • The callback that will be triggered when iteration is complete.

Example:

var extensions = require("node-array-ext");

var a = [ "Hello", "World", "SomethingElse" ];

function finished(err) {
	if(err) {
		console.log(err);
	}
	else {
		console.log("Complete.");
	}
}
function each(i, e, done) {
	setTimeout(function() {
		console.log("%s => %s", i, e);
		done();
	}, 100 * (3 - i));
}

extensions.asyncEach(a, each, finished);

// Output: 
// 3 => SomethingElse
// 2 => World
// 1 => Hello
// Complete.

awaitEach(array, each, cb)

Description:

This method iterates though the elements of the array in order and triggers a callback after all of the elements have been processed.

- note that this method preserves the order and forces synchronous processing of the elements.

Parameters:

• array:
  • Array<T>
  • The array to process.
• each:
  • (i: number, element: T, done: (err?: Error) => void) => void
  • The method that will be called for each element.
• cb:
  • (err?: Error) => void
  • The callback that will be triggered when iteration is complete.

Example:

var extensions = require("node-array-ext");

var a = [ "Hello", "World", "SomethingElse" ];

function finished(err) {
	if(err) {
		console.log(err);
	}
	else {
		console.log("Complete.");
	}
}
function each(i, e, next) {
	setTimeout(function() {
		console.log("%s => %s", i, e);
		next();
	}, 100 * (3 - i));
}

extensions.awaitEach(a, each, finished);

// Output:
// 1 => Hello
// 2 => World
// 3 => SomethingElse
// Complete.