object-run

object-run.js

object-run.js implements the tools needed to use the Concatinative Programming Style on native JavaScript structures/objects.

This module defines a singe method .run(..) on Object.prototype making it visible from all JavaScript objects inheriting from Object.

The .run(..) method simply executes a function in the context of the object from which .run(..) was called. The return value of .run(..) is the non-undefined return value of the passed function or the context object otherwise.

Installation

$ npm install --save object-run

Basic usage

require('object-run')

var o = {}
	.run(function(){
		this.x = 123
		this.y = 321
	})

Conditionaly run a function...

var o = {}
	.run(o.x % 2 == 0,
		function(){
			this.x_is_odd = true
		})

Examples

var l = [1, 2, 3, 4, 5]
	// keep only even elements...
	.filter(function(e){
		return e % 2 == 0 })
	.sort()
	// if length is not even add an extra even number at the end...
	.run(function(){
		this.length % 2 != 0
			&& this.push(this[this.length-1] + 2) })

Components

Object.prototype.run(..)

<obj>.run(<func>)
	-> <obj>
	-> <return-value>

<obj>.run(<cond>, <func>)
	-> <obj>
	-> <return-value>

<func>()
	-> undefined
	-> <return-value>

If <func>() returns undefined then .run(..) will return <obj>.

License

BSD 3-Clause License

Copyright (c) 2016-2020, Alex A. Naanou,
All rights reserved.