findDigit.js

function findDigit(given) {
    // log all the numbers in specified scope that contain a given digit
    for (var i = 100; i >= -100; i--) {
        var absI = Math.abs(i);
        var numberOfDigits = Math.floor(Math.log(absI) / Math.log(10)) + 1;
        var found = false,
            subtract = 0;
        while (numberOfDigits > 0) {
            var x = Math.pow(10, --numberOfDigits);
            var currentDigit = Math.floor((absI - subtract) / x);
            subtract += (currentDigit * x);
            if (currentDigit == given) {
                found = true;
                break;
            }
        }
        if (found) console.log(i);
    }
}