Angular Calculate Sum of Input Field

Question

I am building array of values which will be typed into input field. Array looks like this example:

[{mykey:"32"},{mykey:"32"}]

I tried to calculate sum of it with this example:

reduce(function(prev2, cur) {
      return prev2 + cur.mykey;
    }, 0);

But it only put numbers behind. And don`t calculate. Maybe my array should look like this to calculate? How to get right input as number instead of string?

[{mykey:32},{mykey:32}]

Does this answer your question? [javascript (+) sign concatenates instead of giving sum?](https://stackoverflow.com/questions/45840501/javascript-sign-concatenates-instead-of-giving-sum) — Heretic Monkey, Dec 11 '20 at 14:54

score 1 · Answer 1 · answered Dec 11 '20 at 14:52

1

You need to convert string to a number before adding. Number - MDN documentation

reduce(function(prev2, cur) {
    return prev2 + Number(cur.mykey);
}, 0);

answered Dec 11 '20 at 14:52

Prabh

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Angular Calculate Sum of Input Field

1 Answers1