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/home/yanggyein/yanggyein/yang_home/node_modules/extend-shallow/index.js

'use strict';

var isExtendable = require('is-extendable');
var assignSymbols = require('assign-symbols');

module.exports = Object.assign || function(obj/*, objects*/) {
  if (obj === null || typeof obj === 'undefined') {
    throw new TypeError('Cannot convert undefined or null to object');
  }
  if (!isObject(obj)) {
    obj = {};
  }
  for (var i = 1; i < arguments.length; i++) {
    var val = arguments[i];
    if (isString(val)) {
      val = toObject(val);
    }
    if (isObject(val)) {
      assign(obj, val);
      assignSymbols(obj, val);
    }
  }
  return obj;
};

function assign(a, b) {
  for (var key in b) {
    if (hasOwn(b, key)) {
      a[key] = b[key];
    }
  }
}

function isString(val) {
  return (val && typeof val === 'string');
}

function toObject(str) {
  var obj = {};
  for (var i in str) {
    obj[i] = str[i];
  }
  return obj;
}

function isObject(val) {
  return (val && typeof val === 'object') || isExtendable(val);
}

/**
 * Returns true if the given `key` is an own property of `obj`.
 */

function hasOwn(obj, key) {
  return Object.prototype.hasOwnProperty.call(obj, key);
}

function isEnum(obj, key) {
  return Object.prototype.propertyIsEnumerable.call(obj, key);
}