I'm trying to find a way to access a part of an array with specific indexes, and the indexes are also in array. So, I have something like that:
var arr = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven'];
var arrIndexes = [1, 3, 5];
And I'm searching for an easy way to use arrIndexes to access this specific part of arr, so that my output would be simply ['one', 'three', 'five'].
You can do it with slightly less computational effort by using Array.prototype.map() instead:
var arr = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven'];
var arrIndexes = [1, 3, 5];
const res = arrIndexes.map(i=>arr[i])
console.log(res);
You can do it by using Array.prototype.filter() and includes() function. Try this-
var arr = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven'];
var arrIndexes = [1, 3, 5];
const res = arr.filter((item, index) => arrIndexes.includes(index));
console.log(res);you can using reduce function like this
let newAr=arr.reduce((prev,curr,idx,arr)=>{
if(arrIndexes.includes(idx)){
prev.push(arr[idx]);
}
return prev;
},[])
