lodash/internal/baseCopy.js

/**
 * Copies the properties of `source` to `object`.
 *
 * @private
 * @param {Object} source The object to copy properties from.
 * @param {Object} [object={}] The object to copy properties to.
 * @param {Array} props The property names to copy.
 * @returns {Object} Returns `object`.
 */
function baseCopy(source, object, props) {
  if (!props) {
    props = object;
    object = {};
  }
  var index = -1,
      length = props.length;

  while (++index < length) {
    var key = props[index];
    object[key] = source[key];
  }
  return object;
}

module.exports = baseCopy;