How to get total length of objects in array correctly

Question

Is it even possible to get length of all objects inside an array? Let say i have an array which looks like that:

var foo = [{
    "id": 1,
    "path": {
        "1": [{
            x: 21,
            y: 22
        }, {
            x: 22,
            y: 12
        }],
        "2": [{
            x: 21,
            y: 22
        }, {
            x: 22,
            y: 12
        }]
    }
}];

for (let x in foo) {
    var path = foo[x].path;
    for (let c in path) {
        console.log(path[c]);
    }
}

How can i correctly get total lenght of objects inside path array here?

This could mean a lot of different things. Can you be more specific about what you mean? — Mark, Aug 15 '18 at 04:22
Well inside "1" array, are some objects, and i want the lenght. The same with "2" array, and get the full length. Wich will be 4 in this case. I can easly hardcode that but, what if i'll add more arrays. :) — Suttero, Aug 15 '18 at 04:23

Mamun · Answer 1 · 2018-08-15T04:27:58.183

1

Try to find the length of keys:

Object.keys(path[c]).length

var foo = [{
    "id": 1,
    "path": {
        "1": [{
            x: 21,
            y: 22
        }, {
            x: 22,
            y: 12
        }],
        "2": [{
            x: 21,
            y: 22
        }, {
            x: 22,
            y: 12
        }]
    }
}];

for (let x in foo) {
  var path = foo[x].path;
  var totalLen = 0;
  for (let c in path) {
    totalLen += Object.keys(path[c]).length;
  }
  console.log(totalLen);
}

edited Aug 15 '18 at 04:27

answered Aug 15 '18 at 04:22

Mamun

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How do i add them together so i will get 4? I can do path[c][0].length + path[c][1].length but i want it to be automatic. So i dont have to do it, everytime i add new array. :) – Suttero Aug 15 '18 at 04:28
@Suttero, you can use one variable.....I have just updated my answer...please check. – Mamun Aug 15 '18 at 04:29
@Suttero, you are most welcome :) – Mamun Aug 15 '18 at 04:31

score 1 · Answer 2 · answered Aug 15 '18 at 04:23

I guess this is what you are looking for. Added count variable and incremented in the path.

var foo = [{
  "id": 1,
  "path": {
    "1": [{
      x: 21,
      y: 22
    }, {
      x: 22,
      y: 12
    }],
    "2": [{
      x: 21,
      y: 22
    }, {
      x: 22,
      y: 12
    }]
  }
}];
var count = 0;
for (let x in foo) {
  var path = foo[x].path;
  for (let c in path) {
    //console.log(path[c]);
    count++;
  }
}
console.log(count);

How to get total length of objects in array correctly

2 Answers2