scanWhile - nodef/extra-iterable GitHub Wiki
Scan from left, while a test passes.
Alternatives: scanWhile, scanWhileRight, scanUntil, scanUntilRight. Similar: search, [scan], find.
function scanWhile(x, ft)
// x: an array
// ft: test function (v, i, x)
const xiterable = require('extra-iterable');
var x = [1, 1, 2, 2, 3, 3, 4, 4];
xiterable.scanWhile(x, v => v % 2 !== 0);
// → 2 ^
xiterable.scanWhile(x, v => v % 3 !== 0);
// → 4 ^
xiterable.scanWhile(x, v => v % 6 !== 0);
// → 8 ^