Isogram JavaScript
function isIsogram(str){
return !str.match(/([a-z]).*\1/i);
}
Sore Seahorse
function isIsogram(str){
return !str.match(/([a-z]).*\1/i);
}
function isIsogram(sWord)
{
for (iCharIndex = 0; iCharIndex < sWord.length; iCharIndex++)
if (sWord.substring(iCharIndex + 1).includes(sWord.charAt(iCharIndex)))
return false;
return true;
}