how to split a string without delimiters?

Question

I have string "513". I need array ["5", "1", "3"]. My solution:

function nextBigger(num){
    let numStr = '' + num;
  let numArr = [];

  for(let i = 0; i < numStr.length; ++i) {
    numArr.push(numStr[i]);
  }

  console.log(numArr);
}

nextBigger(513);

But this solution is large and redundant. I need shorter solution.

Answer 1

With ES6, you could use the spread syntax ... which takes an iterable and iterates the single items.

Or just take the power of Array.from, which does nearly the same (and much more).

const getCharacters1 = string => [...string];
const getCharacters2 = string => Array.from(string);

console.log(getCharacters1('513'));
console.log(getCharacters2('513'));

.as-console-wrapper { max-height: 100% !important; top: 0; }

Answer 2

You can just .split() with an empty string as the delimiter. This will split the string at each character:

function nextBigger(num){
  console.log(num.toString().split(""));
}

nextBigger(513);

Answer 3

You can do it by numString.split(''). (Two single quotes without space). That will return an array with all the characters.

Answer 4

Maybe use .split() function.

"513".split("")

Answer 5

You can use the Spread syntax if you want something really short

let a = [...'513']