1  var baseAssignValue = require('./_baseAssignValue'),
 2      eq = require('./eq');
 3  
 4  /**
 5   * This function is like `assignValue` except that it doesn't assign
 6   * `undefined` values.
 7   *
 8   * @private
 9   * @param {Object} object The object to modify.
10   * @param {string} key The key of the property to assign.
11   * @param {*} value The value to assign.
12   */
13  function assignMergeValue(object, key, value) {
14    if ((value !== undefined && !eq(object[key], value)) ||
15        (value === undefined && !(key in object))) {
16      baseAssignValue(object, key, value);
17    }
18  }
19  
20  module.exports = assignMergeValue;