Safely read any number of properties from a JSON object

safeRead.js

/**
 * Safe read to check any amount of properties are safe to traverse
 * From: http://thecodeabode.blogspot.com.au/2013/04/javascript-safely-reading-nested.html
 *
 * Usage... for a nested structure
 * var test = {
 *    nested: {
 *      value: 'Read Correctly'
 *   }
 * };
 * safeRead(test, 'nested', 'value');  // returns 'Read Correctly'
 * safeRead(test, 'missing', 'value'); // returns ''
 *
 * http://thecodeabode.blogspot.com.au/2013/04/javascript-safely-reading-nested.html
 *
 * @returns {*}
 */
var safeRead = function () {
	var current, obj, prop, props, val, _i, _len, read;

	obj = arguments[0];
	props = (2 <= arguments.length) ? [].slice.call( arguments, 1 ) : [];

	read = function ( obj, prop ) {
		if ( ( obj !== null ? obj[ prop ] : void 0 ) === null ) {
			return;
		}

		return obj[prop];
	};

	current = obj;
	for ( _i = 0, _len = props.length; _i < _len; _i ++ ) {
		prop = props[ _i ];

		val = read( current, prop );
		if ( val ) {
			current = val;
		}
		else {
			return '';
		}
	}

	return current;
};