count characters in typescript

var temp = "This is a string.";
var count = (temp.match(/is/g) || []).length;
console.log(count);

Output: 2

Explaination : The g in the regular expression (short for global) says to search the whole string rather than just find the first occurrence. This matches 'is' twice.

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GMtop 85 points

                                    function count (string) {  
  var count = {};
  string.split('').forEach(function(s) {
     count[s] ? count[s]++ : count[s] = 1;
  });
  return count;
}

Thank you! 5

4 (5 Votes)

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3.75

8

Justinpage 80 points

                                    let counter = str =&gt; {
  return str.split('').reduce((total, letter) =&gt; {
    total[letter] ? total[letter]++ : total[letter] = 1;
    return total;
  }, {});
};

counter(&quot;aabsssd&quot;); // =&gt; { a: 2, b: 1, s: 3, d: 1 }

Thank you! 8

3.75 (8 Votes)

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