args2object

Node/JavaScript library to access an item in an object structure given function arguments as path.

Install in Node

$ npm install args2object

Manual installation for Browser apps

Take the browserified file at dist/args2object.bundle.js and include it in your HTML:

<script src='js/args2object.bundle.js'></script>

The browserified file exports the window.args2object function.

Usage

var args2object = require('args2object');  // if Node

var myObject = {
  a: true,
  b: false,
  c: 'hello',
  d: {
    d1: 'foo',
    d2: [1,2,3,4]
  },
  true: {
    false: 0,
    bar: null
  }
};


var getter = args2object(myObject);

getter('a');             // => true
getter('b');             // => false
getter('c');             // => 'hello'
getter('d','d1');        // => 'foo'
getter('d','d2');        // => [1,2,3,4]
getter(true,false);      // => 0
getter(true,'bar');      // => null

getter('a','a1');        // => undefined
getter('a','a1','a11');  // => undefined
getter('e');             // => undefined
getter('e','e1');        // => undefined
getter(null,true,false); // => undefined

getter();                // => the full object


var getter = args2object(myObject, {failOnNotFound: true});

getter('a','a1');        // => throws an Error exception
getter('a','a1','a11');  // => throws an Error exception
getter('e');             // => throws an Error exception
getter('e','e1');        // => throws an Error exception
getter(false);           // => throws an Error exception

API

getter = args2object(object, options)

• param {Object|Function} object: The object to handle.
• param {Object} options (optional):
  • {Boolean} failOnNotFound: Whether to throw an Error if the searched path does not exist in the object structure (default: false).

Returns a getter function.

getter(a,b,c)

Retrieve the value at object[a][b][c].

If the path does not exist it returns undefined (or throws an Error if options.failOnNotFound is set).

Release History

0.1.1 (2014-11-20)

• Make it much more robust and allow retrieving the full object.

0.1.0 (2014-11-14)

• First release.

License

Copyright (c) 2014 Iñaki Baz Castillo Licensed under the MIT license.