Iterating over array of strings produces error

Question

I pass in an array of error messages to parse. An example input would be:

\"An item with this x Id already exists.
 An item with this y id already exists.
 An it         


        

Answer 1

You are getting Error! in end because the splitting is giving you empty line "" and when you check for it with if(!aLines[i]) it returns true because it is empty/null/nothing. You can check it here in a fiddle, you remove the empty line from end and it does not go over array 4 times.

I have also put in following code which shows alert:

    var a="";
    if(!a){
        alert("!a");
    }