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								node_modules/deep-extend/lib/deep-extend.js
									
									
									
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								node_modules/deep-extend/lib/deep-extend.js
									
									
									
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/*!
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 * @description Recursive object extending
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 * @author Viacheslav Lotsmanov <lotsmanov89@gmail.com>
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 * @license MIT
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 *
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 * The MIT License (MIT)
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 *
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 * Copyright (c) 2013-2018 Viacheslav Lotsmanov
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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 * this software and associated documentation files (the "Software"), to deal in
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 * the Software without restriction, including without limitation the rights to
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 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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 * the Software, and to permit persons to whom the Software is furnished to do so,
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 * subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in all
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 * copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 */
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'use strict';
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function isSpecificValue(val) {
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	return (
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		val instanceof Buffer
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		|| val instanceof Date
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		|| val instanceof RegExp
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	) ? true : false;
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}
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function cloneSpecificValue(val) {
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	if (val instanceof Buffer) {
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		var x = Buffer.alloc
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			? Buffer.alloc(val.length)
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			: new Buffer(val.length);
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		val.copy(x);
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		return x;
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	} else if (val instanceof Date) {
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		return new Date(val.getTime());
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	} else if (val instanceof RegExp) {
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		return new RegExp(val);
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	} else {
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		throw new Error('Unexpected situation');
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	}
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}
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/**
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 * Recursive cloning array.
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 */
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function deepCloneArray(arr) {
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	var clone = [];
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	arr.forEach(function (item, index) {
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		if (typeof item === 'object' && item !== null) {
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			if (Array.isArray(item)) {
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				clone[index] = deepCloneArray(item);
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			} else if (isSpecificValue(item)) {
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				clone[index] = cloneSpecificValue(item);
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			} else {
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				clone[index] = deepExtend({}, item);
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			}
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		} else {
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			clone[index] = item;
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		}
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	});
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	return clone;
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}
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function safeGetProperty(object, property) {
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	return property === '__proto__' ? undefined : object[property];
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}
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/**
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 * Extening object that entered in first argument.
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 *
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 * Returns extended object or false if have no target object or incorrect type.
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 *
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 * If you wish to clone source object (without modify it), just use empty new
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 * object as first argument, like this:
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 *   deepExtend({}, yourObj_1, [yourObj_N]);
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 */
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var deepExtend = module.exports = function (/*obj_1, [obj_2], [obj_N]*/) {
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	if (arguments.length < 1 || typeof arguments[0] !== 'object') {
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		return false;
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	}
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	if (arguments.length < 2) {
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		return arguments[0];
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	}
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	var target = arguments[0];
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	// convert arguments to array and cut off target object
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	var args = Array.prototype.slice.call(arguments, 1);
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	var val, src, clone;
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	args.forEach(function (obj) {
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		// skip argument if isn't an object, is null, or is an array
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		if (typeof obj !== 'object' || obj === null || Array.isArray(obj)) {
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			return;
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		}
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		Object.keys(obj).forEach(function (key) {
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			src = safeGetProperty(target, key); // source value
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			val = safeGetProperty(obj, key); // new value
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			// recursion prevention
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			if (val === target) {
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				return;
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			/**
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			 * if new value isn't object then just overwrite by new value
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			 * instead of extending.
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			 */
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			} else if (typeof val !== 'object' || val === null) {
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				target[key] = val;
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				return;
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			// just clone arrays (and recursive clone objects inside)
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			} else if (Array.isArray(val)) {
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				target[key] = deepCloneArray(val);
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				return;
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			// custom cloning and overwrite for specific objects
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			} else if (isSpecificValue(val)) {
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				target[key] = cloneSpecificValue(val);
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				return;
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			// overwrite by new value if source isn't object or array
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			} else if (typeof src !== 'object' || src === null || Array.isArray(src)) {
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				target[key] = deepExtend({}, val);
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				return;
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			// source value and new value is objects both, extending...
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			} else {
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				target[key] = deepExtend(src, val);
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				return;
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			}
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		});
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	});
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	return target;
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};
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