I want to filter this array by index?
arr = [1,2,3,4,5,6];
I am trying to use
arr.filter(x => x === [2,3])
but it does not seems to work?
I want only [2, 3]rd index?
You need map here rather than filter:
arr = [11,22,33,44,55,66];
indexes = [2,3]
result = indexes.map(i => arr[i])
console.log(result)Note that this returns values in the indexes order, but if indexes are unsorted and you need values in the source order, then you indeed need filter. Consider:
arr = [11,22,33,44,55,66];
indexes = [4,2]
result1 = indexes.map(i => arr[i])
result2 = arr.filter((_,i) => indexes.includes(i))
console.log(result1)
console.log(result2)