Get multiple character positions in array?

Question

I want to get position of dots and commas in an array.

w.wer,ads,

should give something like:

[0] > 1
[1] > 5
[2] > 9

How can this be done with javascript?

Answer 1

function getPositions(regex, str) {
    var counts = [], m;
    while (m = regex.exec(str)) {
        counts.push(regex.lastIndex - m[0].length);
    }
    return counts;
}

// Usage:
getPositions(/[,.]/g, 'w.wer,ads,'); // => [1,5,9]

Answer 2

Try the following

var getAllIndexesOf = function(str, toFind) {
  var all = [];
  for (var i = 0; i < str.length; i++) {
    if (toFind.indexOf(str[i]) >= 0) {
      all.push(i);
    }
  }
  return all;
}

var result = getAllIndexsOf("w.wer,ads,", [".", ","]);