2-copy-of-code/11-arrays-and-loops.html

<!DOCTYPE html>
<html>
  <head>
    <title>Arrays and Loops</title>
  </head>
  <body>
    <script>
      /*
      const myArray = [
        10, 
        20, 
        30
      ];
      console.log(myArray);

      console.log(myArray[1]);
      myArray[0] = 99;
      console.log(myArray);

      [1, 'hello', true, { name: 'socks' }, [1, 2]]

      console.log(typeof [1, 2]);
      console.log(Array.isArray([1, 2]));

      console.log(myArray.length);
      
      myArray.push(100);
      console.log(myArray);

      myArray.splice(0, 1);
      console.log(myArray);
      */

      /*
      let i = 1;

      while (i <= 5) {
        console.log(i);
        i++;
      }

      for (let i = 1; i <= 5; i++) {
        console.log(i);
      }

      let randomNumber = 0;

      while (randomNumber < 0.5) {
        randomNumber = Math.random();
      }

      console.log(randomNumber);
      */

      /*
      const todoList = [
        'make dinner',
        'wash dishes',
        'watch youtube'
      ];

      for (let i = 0; i < todoList.length; i++) {
        const value = todoList[index];
        console.log(value);
      }
      */

      /*
      const nums = [1, 1, 3];
      let total = 0;

      for (let i = 0; i < nums.length; i++) {
        const num = nums[i];
        total += num;
      }
      console.log(total);

      const numsDoubled = [];

      for (let i = 0; i < nums.length; i++) {
        const num = nums[i];
        numsDoubled.push(num * 2);
      }
      console.log(numsDoubled);
      */

      const array1 = [1, 2, 3];
      const array2 = array1.slice();
      array2.push(4);
      console.log(array1);
      console.log(array2);

      const [firstValue, secondValue] = [1, 2, 3];

      for (let i = 1; i <= 10; i++) {
        if (i % 3 === 0) {
          continue;
        }
        console.log(i);
        if (i === 8) {
          break;
        }
      }

      let i = 1;

      while (i <= 10) {
        if (i % 3 === 0) {
          i++;
          continue;
        }
        console.log(i);
        i++;
      }

      function doubleArray(nums) {
        const numsDoubled = [];

        for (let i = 0; i < nums.length; i++) {
          const num = nums[i];
          if (num === 0) {
            return numsDoubled;
          }
          numsDoubled.push(num * 2);
        }
        return numsDoubled;
      }
      console.log(doubleArray([1, 1, 3]));
      console.log(doubleArray([2, 2, 5, 0, 5]));
    </script>
  </body>
</html>