JS Match all occurrences of substring in a string

Question

I have seen this link but my question is different. javascript regex match all occurrences of substring?

match() function in JS can be used to

Answer 1

Try with:

let re = /HaHa/g,
str = "Hello_HaHaHaHackerRank";
while ((match = re.exec(str)) != null) {
  console.log("match found at " + match.index);
}

Answer 2

indexOf has a fromIndex value you can use with a while loop str.indexOf(searchValue[, fromIndex])

let s = 'Hello_HaHaHaHackerRank';
let find = 'HaHa'
let hacker = [];
let i = 0, j=0;
while (~(i = s.indexOf (find,i + find.length))) hacker.push(i);
console.log (hacker)

If you want to include all occurences, don't add the length of the word.

while (~(i = s.indexOf (find,++i))) hacker.push (i)