String to array with different length using regex

Question

String to array with length 2 can be done like below.

let str1 = '112213';
let str1Array = str1.match(/.{2}/g);
console.log(str1Array);

And the result is

[ '11', '22', '13' ]

Is it possible to get [ '1', '12', '2' , '13'] similarly?

It may be possible, depending on the input strings you have and the meaning of array elements. In short: what do you want to match? — mrzasa
– mrzasa, Commented Feb 24, 2018 at 14:12
my mistake, just need to split with different length(here 1 and 2) — shijin
– shijin, Commented Feb 24, 2018 at 14:17

revo · Accepted Answer · 2018-02-24 14:25:59Z

5

You can use split() instead of match() providing both lengths in one regex:

(.)(..)?

Optional quantifier is essential when string length is not even.

JS Code:

console.log(
  '112213'.split(/(.)(..)?/).filter(Boolean)
);

answered Feb 24, 2018 at 14:25

revo

49k15 gold badges84 silver badges123 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Srdjan M. · Accepted Answer · 2018-02-24 14:36:24Z

1

function myFunction() {
  var text = document.getElementById("input").value;
  console.clear()
  var re = /(.)(.{2})/g;
  var m;
  var arr = [];
  
  do {
      m = re.exec(text);
      if (m) {
          arr.push(m[1], m[2]);
      }
  } while (m);
  console.log(arr)
}

<form action="javascript:myFunction()">
  <input id="input" type="text" value="112213"><br><br>
  <input type="submit" value="Submit">
</form>

answered Feb 24, 2018 at 14:36

Srdjan M.

3,4253 gold badges17 silver badges35 bronze badges

Collectives™ on Stack Overflow

String to array with different length using regex

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related