deepclonefunc.js

/*
 # Deep Cloning Objects and Arrays with Func
 A Javascript function that deep clones objects and arrays and calls a function
 on an element that is not an array, set, or map.
 ─────────────────────────────────────────────────────────────────────────────
 Author: @RockStarwind
 Date: 2019-19-10
 Version: 1.0.0 (based on deepclone.js 1.0.2)
 Repo: https://github.com/RockStarwind/js-functions
 License: MIT
 ─────────────────────────────────────────────────────────────────────────────
 Polyfill for Object.assign:
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Polyfill
*/

function deepCloneFunc(obj, func) {
	if (typeofObject(func) !== "[object Function]") {
		func = function(obj) { return obj }
	}
	function typeofObject(obj) {
		return Object.prototype.toString.call(obj);
	}
	function isArray(obj) {
		return typeofObject(obj) === "[object Array]";
	}
	function isHash(obj) {
		return typeofObject(obj) === "[object Object]";
	}
	function isMap(obj) {
		return typeofObject(obj) === "[object Map]"
	}
	function isSet(obj) {
		return typeofObject(obj) === "[object Set]"
	}
	function arrayShallowClone(obj) {
		return obj.slice(0);
	}
	function hashShallowClone(obj) {
		return Object.assign({}, obj);
	}

	var newObj;
	var set = false;
	var map = false;
	// Is this a set or a map?
	if (isSet(obj) || isMap(obj)) {
		newObj = [];
		// Convert the set into an array
		if (isSet(obj)) {
			obj.forEach(function (value) { return newObj.push(value) });
			set = true;
		}
		if (isMap(obj)) {
			obj.forEach(function (value, key) { return newObj.push([key, value]) });
			map = true;
		}
		obj = arrayShallowClone(newObj);
	}
	// Is this an array or a hash table?
	if (isArray(obj) || isHash(obj)) {
		// Is this an array?
		if (isArray(obj)) {
			// Shallow clone the array
			newObj = arrayShallowClone(obj);
			// Loop through newObj's elements
			for (var i = 0; i < newObj.length; i++) {
				newObj[i] = deepCloneFunc(newObj[i], func);
			}
		}
		// Is this a hash?
		else {
			// Shallow clone the hash object
			newObj = hashShallowClone(obj);
			// Loop through newObj's properties
			for (var prop in newObj) {
				newObj[prop] = deepCloneFunc(newObj[prop], func);
			}
		}
		// Did this object begin as either a set or a map?
		if (set || map) {
			// Convert it back into a set
			if (set) { newObj = new Set(newObj.slice(0)); }
			// Convert it back into a map
			if (map) { newObj = new Map(newObj.slice(0)); }
		}
		return newObj;
	}
	// Is this something other than an array or hash?
	else {
		return func(obj);
	}
}