var isNative = require('../lang/isNative');

/* Native method references for those with the same name as other `lodash` methods. */
var nativeNow = isNative(nativeNow = Date.now) && nativeNow;

/**
 * Gets the number of milliseconds that have elapsed since the Unix epoch
 * (1 January 1970 00:00:00 UTC).
 *
 * @static
 * @memberOf _
 * @category Date
 * @example
 *
 * _.defer(function(stamp) {
 *   console.log(_.now() - stamp);
 * }, _.now());
 * // => logs the number of milliseconds it took for the deferred function to be invoked
 */
var now = nativeNow || function() {
  return new Date().getTime();
};

module.exports = now;
