object-run.js/README.md

# object-run.js

_object-run.js_ implements the tools needed to use the [Concatinative 
Programming Style](https://en.wikipedia.org/wiki/Concatenative_programming_language) 
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

```shell
$ npm install --save object-run
```

## Basic usage

```javascript
require('object-run')
```

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

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

## Examples

```javascript
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](./LICENSE)

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


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