axios/lib/merge.js

var forEach = require('./forEach');

/**
 * Accepts varargs expecting each argument to be an object, then
 * immutably merges the properties of each object and returns result.
 *
 * When multiple objects contain the same key the later object in
 * the arguments list will take precedence.
 *
 * Example:
 *
 * ```js
 * var result = merge({foo: 123}, {foo: 456});
 * console.log(result.foo); // outputs 456
 * ```
 *
 * @param {Object} obj1 Object to merge
 * @returns {Object} Result of all merge properties
 */
module.exports = function merge(obj1/*, obj2, obj3, ...*/) {
  var result = {};
  forEach(arguments, function (obj) {
    forEach(obj, function (val, key) {
      result[key] = val;
    });
  });
  return result;
};