Binary Gap JavaScript

binary-gap.js

var tests = [234534534234];

tests.forEach(function (t) {
    Test(t);
});

function Test(N) {
    var bin = N.toString(2);
    var b = 0;
    var col = bin.split("1").filter(function (val) {
        return val ? true : false;
    });
    if (col.length) {
        if (bin.slice(-1) != '1') {
            col.splice(col.length - 1, 1)
        }
        col.forEach(function (val) {
            val.length > b ? b = val.length : b = b;
        });
    }
    return b;
}