Strings from index in array - Javascript [duplicate]

Question

If I have an array of strings:

array1 = ['mango', 'orange', 'apple','strawberry'];

and one array of indexes:

array2 = [1,3];

How can I create a new array with the strings in array1, based on the indexes in array2?

The new array would in this case look like this:

array3 = [orange, strawberry]

Iterate the array of indexes and use the value of those to index the first array and push those values into a new array, see answer/ — Ryan Wilson
– Ryan Wilson, Commented Sep 6, 2018 at 16:35
Map array2 with array1. Try that and add an attempt to your question. — zero298
– zero298, Commented Sep 6, 2018 at 16:36
It’s a simple map: const array3 = array2.map((index) => array1[index]). — Sebastian Simon
– Sebastian Simon, Commented Sep 6, 2018 at 16:36

Ryan Wilson · Accepted Answer · 2018-09-06 16:37:30Z

0

//Declare a new array object
let newArray = [];

//iterate the array of index values, and use the value to index the first array and push into new array
for(let i = 0; i < array2.length; i++){
    newArray.push(array1[array2[i]]);
}

//log the results in new array
console.log(newArray);

answered Sep 6, 2018 at 16:37

Ryan Wilson

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