Javascript - Rewriting for-loop using arrow functions?

Question

How would I rewrite this using an arrow function?

Would forEach be the only way?

And what would be an example of an arrow function that doesn't use the forEach method.

CODE

let word = 'Bloc';

const reverseString = (str) => {

   let stack = [];

   for (let i of str) {

     stack.push(str[i]);

   }

   let reversed = '';

   for (let i of word) {

     reversed += stack.pop();

   }

  return reversed;

 }

console.log(reverseString('Bloc'));

You are already using an arrow function in your code, and you are using no `function`s. There are no non-arrow functions to convert to arrow functions. — CertainPerformance, Jun 06 '19 at 06:59
Might belong to [CodeReivew](https://codereview.stackexchange.com/) but...what do you want to re-write here? — VLAZ, Jun 06 '19 at 07:01
Possible duplicate of [Loop through an array in JavaScript](https://stackoverflow.com/questions/3010840/loop-through-an-array-in-javascript) — ceving, Jun 06 '19 at 07:09

score 2 · Answer 1 · answered Jun 06 '19 at 07:02

2

You would use the Array.reduce method. (In this case, reduceRight).

const str = 'helloworld'; 

const newStr = str.split('').reduceRight((acc, cur) => {
    return acc + cur; 
}, ''); 

console.log(newStr);

answered Jun 06 '19 at 07:02

dwjohnston

11,163
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score 0 · Answer 2 · edited Jun 06 '19 at 07:11

0

In this case for reverse String you can also follow the following code :-

let word = 'Bloc';

const reverseString = (str) => {
  let reversed = '';

  // use split function of string to split and get array of letter and then call the reverse method of array and then join it .
  reversed = str.split('').reverse().join('');

  return reversed;

}

console.log(reverseString('Bloc'));

edited Jun 06 '19 at 07:11

Code Maniac

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answered Jun 06 '19 at 07:09

Sunny Goel

1,982
2
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This doesn't really answer the question - which is about how to avoid using for loops. – dwjohnston Jun 06 '19 at 08:11

Javascript - Rewriting for-loop using arrow functions?

2 Answers2