Psst: have a look at the JavaScript Console 💁

      // ## Array Cardio Day 2

      const people = [
        { name: 'Wes', year: 1988 },
        { name: 'Kait', year: 1986 },
        { name: 'Irv', year: 1970 },
        { name: 'Lux', year: 2015 }
      ];

      const comments = [
        { text: 'Love this!', id: 523423 },
        { text: 'Super good', id: 823423 },
        { text: 'You are the best', id: 2039842 },
        { text: 'Ramen is my fav food ever', id: 123523 },
        { text: 'Nice Nice Nice!', id: 542328 }
      ];

  

      // Some and Every Checks
      // Array.prototype.some() // is at least one person 19 or older?

      const hasAdults = people.some( function(person) {
          const currYear = new Date().getFullYear();
          return (currYear - person.year) >= 19;
      });

      console.log(hasAdults); // true

      // ES2015 variation with implicit return

      const hasAdults = people.some( person => (new Date().getFullYear - person.year) >= 19 );

      console.log(hasAdults); // true

  

      // Array.prototype.every() // is everyone 19 or older?

      const allAdults = people.every( function(person) {
          const currYear = new Date().getFullYear();
          return (currYear - person.year) >= 19;
      });

      console.log(allAdults); // false

      // ES2015 variation with implicit return

      const allAdults = people.every( person => (new Date().getFullYear - person.year) >= 19 );

      console.log(allAdults); // false

  

      // Array.prototype.find()
      // Find is like filter, but instead returns just the one you are looking for
      // find the comment with the ID of 823423

      const comment = comments.find( function(comment) {
          return comment.id === 823423;
      });

      // ES2015 variation with implicit return

      const comment = comments.find( comment => comment.id === 823423 );

      console.log(comment); // {text: "Super good", id: 823423}

  

      // Array.prototype.findIndex()
      // Find the comment with this ID

      const indexToDelete = comments.findIndex( function(comment) {
          return comment.id === 823423;
      });

      // ES2015 variation with implicit return

      const indexToDelete = comments.find( comment => comment.id === 823423 );

      console.log(indexToDelete); // 1

      // delete the comment with the ID of 823423

      comments.splice(indexToDelete, 1);

      console.table(comments);

      // Or, without mutation by 'spreading' over the
      // new arrays created by slice()

      const newComments = [
          ...comments.slice(0,indexToDelete),
          ...comments.slice(indexToDelete + 1)
      ];

      console.table(newComments);