In the callback function within Array.prototype.map, make sure to access the newly created array

Question

In the callback function within Array.prototype.map, make sure to access the newly created array

Array.prototype.map() creates a new array. How can I use this new array within the callback function passed to Array.prototype.map()?

For instance:

someArray.map(function(item, idx, arr) {
    return { theCreatedArray: xyz };
});

What should I assign to xyz in this scenario?

Additional Info [Context]

Why am I interested in doing this? The object I generate in the callback relies on accessing the referencing array, and restructuring this requirement seems challenging. As an alternative, I prefer to adhere to it.

javascript arrays

Answer 1

Answer №1

If you're looking to achieve this functionality, using .map() won't get the job done. Instead, consider utilizing .reduce():

someArray.reduce(function(result, element, index) {
  // 'result' represents the output of the function, which in this case is an array
  result.push({property: result});
  return result;
}, []);

Answer 2

If you're looking to achieve this functionality, using .map() won't get the job done. Instead, consider utilizing .reduce():

someArray.reduce(function(result, element, index) {
  // 'result' represents the output of the function, which in this case is an array
  result.push({property: result});
  return result;
}, []);

In the callback function within Array.prototype.map, make sure to access the newly created array

Answer №1

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