Js Array Map Return Object

As op used` map ()` already. @user37309 no the op didn't said its object. As the map () method calls the function on each item in the array, whatever we return in the function becomes that items value.

The final returned map uses the unique values from the test function as keys, which can be used to get the array of elements in each group. Const points = new array (); Map () does not change the original array.

Usually a map function will pay attention to the existing value in the array it is being used to process so it has to be called for each item in the array and will generate a new value for each item.

Therefore if we return person we will get back exactly what we had in the original array. The method is primarily useful when grouping elements that are associated with an object, and in particular when that. To transform this array of arrays into an array of objects, you can simply pass a map function as the second (optional) argument to array.from () which will be called on every element of the array. Const name = sammy const map = array.prototype.map const newname = map.call(name, eachletter => { return `$ {eachletter}a` }) console.log(newname) this output is logged to the console: