function fastContains(list, elem) {
    return list.indexOf(elem) !== -1;
}

function slowContains(list, elem) {
    for (var i = 0; i < list.length; i++) {
        if (list[i] === elem) {
            return true;
        }
    }
    return false;
}

var contains = Array.prototype.indexOf ? fastContains : slowContains;

module.exports = {
    contains: contains
};