Convert String to Array in Javascript in pair

Question

I have a string like

var str = "aabbrdfc0912";

and i want to convert it in an array in pair of two like

var arr = ["aa","bb","rd","fc","09","12"]; 

Please suggest.

Answer 1

You could use a regular expression for it.

var str = "aabbrdfc0912",
    array = str.match(/..|./g);
console.log(array);

Answer 2

One of the possible regex could be /[\w]{2}/g

var str = "aabbrdfc0912", splited_arr;

splitted_arr = str.match(/[\w]{2}/g);
console.log(splitted_arr);

Answer 3

You can use the match function and a small regex to do that:

var even_str = "aabbrdfc0912",
    odd_str = "aabbrdfc0912X";

console.log( splitInPairs(even_str) );
console.log( splitInPairs(odd_str) );

function splitInPairs(str) {
    return str.match(/..?/g);
}

Answer 4

String.match(rg) would let you do this:

console.log("aabbrdfc0912".match(/\w\w/g))

Answer 5

var arr = str.match(/.{1,2}/g);

will give you result

["aa","bb","rd","fc","09","12"]; 

Answer 6

For-loop with increment of 2 could be helpful.

var str = "aabbrdfc09123";;
var op = [];
for (var i = 0; i < str.length; i += 2) {
  op.push(str[i] + (str[i + 1] || ''));
}
console.log(op);

Answer 7

Another solution using String.split, Array.slice and Array.forEach functions:

var str = "aabbrdfc0912", result = [];

str.split('').forEach(function(v, k, arr){
   if (k % 2 !== 0) this.push(arr.slice(k-1, k+1).join(''));
}, result);

console.log(result);  // ["aa", "bb", "rd", "fc", "09", "12"]

---

And one more approach with String.split and Array.filter methods:

result = str.split(/(\w{2})/).filter(Boolean);

console.log(result);  // ["aa", "bb", "rd", "fc", "09", "12"]

Answer 8

well, this can be done like this too instead of regex,

var str = "aabbrdfc0912";
var result = [];
var piece = 2;

while (str.length) {
  result.push(str.slice(0, piece));
  str = str.substr(piece);
}

console.log(result);
// result = ["aa","bb","rd","fc","09","12"];