var baseRest = require('./_baseRest'),

isIterateeCall = require('./_isIterateeCall');

/**

* Creates a function like `_.assign`.
*
* @private
* @param {Function} assigner The function to assign values.
* @returns {Function} Returns the new assigner function.
*/

function createAssigner(assigner) {

return baseRest(function(object, sources) {
  var index = -1,
      length = sources.length,
      customizer = length > 1 ? sources[length - 1] : undefined,
      guard = length > 2 ? sources[2] : undefined;

  customizer = (assigner.length > 3 && typeof customizer == 'function')
    ? (length--, customizer)
    : undefined;

  if (guard && isIterateeCall(sources[0], sources[1], guard)) {
    customizer = length < 3 ? undefined : customizer;
    length = 1;
  }
  object = Object(object);
  while (++index < length) {
    var source = sources[index];
    if (source) {
      assigner(object, source, index, customizer);
    }
  }
  return object;
});

}

module.exports = createAssigner;