Spam borligini tekshiring

darsga qaytish

Agar “str” tarkibida “viagra” yoki “XXX” bo‘lsa, “true” qaytaradigan “checkSpam(str)” funksiyasini yozing, aks holda “false”.

Funktsiya katta-kichik harflarga sezgir bo’lmasligi kerak:

          checkSpam("buy ViAgRA now") == true;
checkSpam("free xxxxx") == true;
checkSpam("innocent rabbit") == false;
        

Qidiruvni katta-kichik harflarga sezgir qilmaslik uchun satrni kichik harfga keltiramiz va keyin qidiramiz:

function checkSpam(str) {
  let lowerStr = str.toLowerCase();

  return lowerStr.includes("viagra") || lowerStr.includes("xxx");
}

alert(checkSpam("buy ViAgRA now"));
alert(checkSpam("free xxxxx"));
alert(checkSpam("innocent rabbit"));