确认末尾字符算法挑战

function confirmEnding(str, target) {
    // "Never give up and good luck will find you."
    // -- Falcor
    //substr
    return target == str.substr(str.length-target.length,target.length);
    //substring
    //return target == str.substring(str.length-target.length,str.length);
}


confirmEnding("Bastian", "n");