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here is object.push or json.setNode method i implemented for my needs. the name of the function is not ‘push’ because push method used in Array which is a subset of Object.

Sample:

var test = { };

test.setNode("path.to.your.variable", "my value");

// result:
// alert(test.path.to.your.variable);
//
// will return 'my value'

Code:

Object.prototype.setNode = function(_key, _value) {
	var module = this;
	var spaceArray = _key ? _key.split('.') : [];
	var subSpace = null;
	var ndx = null;

	for (ndx = 0; ndx < spaceArray.length - 1 && (subSpace = spaceArray[ndx]); ++ndx) {
		if (subSpace) {
			if (!module[subSpace]) {
				module[subSpace] = {};
			}

			module = module[subSpace];
		}
	}

	subSpace = spaceArray[ndx];
	module[subSpace] = _value;

	return this;
};