Name : _getInfoOf() - Language : JavaScript - type : function - Platform : generic - tag : indexOf, object

getObectIndex.js

// Extend an object to get the value of the first occurence of a specific index
var _getInfoOf = function (obj, index, path, isIndexExists) {
    "use strict";
	var prevPath = '';
    	if (typeof path !== 'undefined') {
       		prevPath = path + '.';
    	} // END IF
    	if (typeof isIndexExists === 'undefined') {
       		isIndexExists = [];
    	} // END IF

    	for (var key in obj) {
       		if (obj.hasOwnProperty(key)) {
            		if (key !== index && typeof (obj[key]) === 'object') {
                		isIndexExists = _getInfoOf(obj[key], index, prevPath + key, isIndexExists);
            		} else if (key === index) {
                		isIndexExists[isIndexExists.length] = {
                    			'path': prevPath + key,
                    			'value': obj[key]
                		};
            		} // END IF
        	} // END IF
    	} // END FOR
    	return isIndexExists;
};

function multiIndex(obj,is) {  // obj,[1,2,3] -> obj[1][2][3]
    return is.length ? multiIndex(obj[is[0]],is.slice(1)) : obj
}
function pathIndex(is) {       // obj,'1.2.3' -> obj[1][2][3]
    return multiIndex(obj,is.split('.'))
}

var aObj={'jack':3, 'peter':4, '5':'col', 'kk':{'aa':22,'zz':0}, 'till':'ding'};

pathIndex(aObj,_getInfoOf(aObj,"aa")[0].path) = 1;