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<b>Warning</b>:  session_start(): Session cannot be started after headers have already been sent in <b>/home/tvrreohg/public_html/manga.php</b> on line <b>13</b><br />
﻿'use strict';

module.exports = function diff(values) {
  let valuesToDiff;

  if (values instanceof this.constructor) {
    valuesToDiff = values.all();
  } else {
    valuesToDiff = values;
  }

  const collection = this.items.filter(item => valuesToDiff.indexOf(item) === -1);

  return new this.constructor(collection);
};