recursion example

gistfile1.txt

---

{
  "toplist": [
    {
      "name": "something",
      "color": "black",
      "lines": [
        {
          "name": "first",
          "color": "blue"
        },
        {
          "name": "second",
          "color": "red",
          "lines": [
            {
              "name": "first_again",
              "color": "blueish"
            },
            {
              "name": "second_again",
              "color": "orange",
              "lines": [
                {
                  "name": "first_once_more",
                  "color": "chartreuse"
                },
                {
                  "name": "second_once_more",
                  "color": "magenta"
                }
              ]
            }
          ]
        },
        {
          "name": "third",
          "color": "green"
        }
      ]
    }
  ]
}

---

var lines = 👆.toplist;
var count = 1;
var depth = 0;

function print_lines(lines, count, depth) {
  for (const line of lines) {
    console.log(
      count, ', ',
      depth, ' deep: ',
      line.name, ' - ', line.color
    );
    if (line.lines) {
      // recurse!
      print_lines(line.lines, count, depth);
    }
  }
}

---

1, 0 deep: something - black
2, 1 deep: first - blue
3, 1 deep: second - red
4, 2 deep: first_again - blueish
5, 2 deep: second_again - orange
6, 1 deep: third - green

---

// what if we want to stop halfway and restart there later?

var skip_until = 'first_again';
var engaged = false;

function print_lines(lines, count, depth, skip_until, engaged) {
  for (const line of lines) {
    if (line.name == skip_until) {
      engaged = true; // from now on, do the thing
    }
    if (engaged) {
      console.log(
        count, ', ',
        depth, ' deep: ',
        line.name, ' - ', line.color
      );
    }
    if (line.lines) {
      print_lines(line.lines, count, depth, skip_until, engaged);
    }
  }
}

---

4, 2 deep: first_again - blueish
5, 2 deep: second_again - orange
6, 1 deep: third - green