Can you suggest an alternative for the "return" statement within a "for loop" in order to retrieve all values from the loop?

Question

Can you suggest an alternative for the "return" statement within a "for loop" in order to retrieve all values from the loop?

When using

numInOrder + " : " + nameInOrder;

, the console only displays one value: "1 : a".

However, I would like to see:

"1 : a

2 : b

3 : c

4 : d

5 : e

6 : f"

in the console.log output.

Additionally, I do not want to use

consol.log(numInOrder + " : " + nameInOrder);

instead of

return numInOrder + " : " + nameInOrder;

, as

consol.log(numInOrder + " : " + nameInOrder);

prints:

"1 : a

2 : b

3 : c

4 : d

5 : e

6 : f

undefined"

To avoid printing undefined at the end of

numInOrder + " : " + nameInOrder;

, how can this code be improved?

list = ['a','b','c','d','e','f'];

function x() {
  let result = "";
  for (var i=0; i<list.length; i++) {
    var numInOrder = i+1;
    var nameInOrder = list[i];
    result += numInOrder + " : " + nameInOrder + "\\n";
  }
  return result;
}

console.log(x());

javascript return closures

Answer 1

Answer №1

Transform the map into an array of desired strings, then concatenate them using \n as the separator before returning the result:

list = ['a','b','c','d','e','f'];
const x = () => list
  .map((char, i) => char + ' : ' + (i + 1))
  .join('\n');

console.log(x());

Alternatively, to modify your original code with a bit more verbosity but retaining the same logic:

list = ['a', 'b', 'c', 'd', 'e', 'f'];

function x() {
  const arr = [];
  for (var i = 0; i < list.length; i++) {
    var numInOrder = i + 1;
    var nameInOrder = list[i];

    arr.push(numInOrder + " : " + nameInOrder);
  }
  return arr.join('\n');
}

console.log(x());

Answer 2

Transform the map into an array of desired strings, then concatenate them using \n as the separator before returning the result:

list = ['a','b','c','d','e','f'];
const x = () => list
  .map((char, i) => char + ' : ' + (i + 1))
  .join('\n');

console.log(x());

Alternatively, to modify your original code with a bit more verbosity but retaining the same logic:

list = ['a', 'b', 'c', 'd', 'e', 'f'];

function x() {
  const arr = [];
  for (var i = 0; i < list.length; i++) {
    var numInOrder = i + 1;
    var nameInOrder = list[i];

    arr.push(numInOrder + " : " + nameInOrder);
  }
  return arr.join('\n');
}

console.log(x());

Can you suggest an alternative for the "return" statement within a "for loop" in order to retrieve all values from the loop?

Answer №1

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