filterAt

Keep the values at given indices.

Alternatives: filter, filterAt.
Similar: map, filter, reject, reduce, accumulate.

function filterAt(x, is)
// x:  an iterable
// is: indices (sorted)

const xiterable = require('extra-iterable');

var x = [2, 4, 6, 8];
[...xiterable.filterAt(x, [1, 2])];
// → [4, 6]

[...xiterable.filterAt(x, [1, 3])];
// → [4, 8]

References

• ist.get: Java