ForEach under the hood is from the Yandex developer. Rewrite to the sander from the slide - not working.

[briley]

Hello, everyone! I'm looking at the slides from the JavaScript course, Part 1: Coursera bases and functions, in the second week, author: Physiakov Denis, head of the Yandex Development Service. It's a function for Each under the hood. I'm trying to do everything, as shown on slides, in a sandbox, but I can't. What's the mistake?

  let tweet = [  
          { hashtags: ['wstdays'], likes: 16},
          { hashtags: ['html'], likes: 8},
          { hashtags: ['wstdays'], likes: 10},
          { likes: 7}
          ];
    let result = [];
    function forEach(callback){
      for (let i=0; i<this.length; i++) {
        callback(this[i], i);
      };
      function filterWts(tweet, index){
        let hashtags = tweet.hashtags;
        if (Array.isArray(hashtags) && hashtags.indexOf('wstdays') !== -1) {
         result.push(tweet)
        }
      }
    forEach(filterWts)

[Demir]

You have a function. thisso it's supposed to call the object as a method. JS forEach - it's a mass method, so it's there. this- is a mass. Put your function in the prototype of the masses or instead. this Use the additional argument for the type function. forEach( arr, callback )♪

In other words, when you call forEach(filterWts), you don't point out what work needs to be done with your body. Unlike in JS forEach this is clearly stated before the point forEach♪