Finds indices of values passing a test. :running: :vhs: :package: :moon: :ledger:

Alternatives: findIndex, findIndices. Similar: find, findIndex. This is part of package extra-array.

array.findIndices(x, fn);
// x:  an array
// fn: test function (v, i, x)

const array = require('extra-array');

var x = [1, 2, 3, 4, 5];
array.findIndices(x, v => v % 2 == 0);
// [ 1, 3 ] ^     ^

array.findIndices(x, v => v % 2 == 1);
// [ 0, 2, 4 ] ^     ^

references

• Data.List.findIndices: Haskell
• List-Extra.findIndices: elm
• find-array: @hdkhoa162