Codewars JS learning

1.Abbreviate a Two Word Name

function abbrevName(name){

  var nameArray = name.split(" ");
  return (nameArray[0][0] + "." + nameArray[1][0]).toUpperCase();
}

2.获取字符串的长度（牛客网）

function strLength(s, bUnicode255For1) {
    var l = s.length;
    if(!bUnicode255For1){
        for(var i in s){
            if(s.charCodeAt(i)>255){
                l++;
            }
        }
    }
    return l;
}

3.邮箱字符串判断（牛客网）

function isAvailableEmail(sEmail) {
   var reg=/^([0-9A-Za-z\-_\.]+)@([0-9a-z]+\.[a-z]{2,3}(\.[a-z]{2})?)$/g;
   return reg.test(sEmail)
}