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

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Asked: June 13, 20262026-06-13T08:07:43+00:00 2026-06-13T08:07:43+00:00

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

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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 item with this barcode already exists.
"

That is, the string is literally each line above separated by a \n, with a final \n at the end.

function( msg )
{
  alert( "\"" + msg + "\"" );
  var aLines = msg.split( /\r?\n+/ );

  for ( var i in aLines )
  {
     if ( !aLines[i] ) { alert( "Error!" ); continue; }
     alert( i + ": \"" + aLines[i]  + "\"" );
  }
}

I split it into lines, and iterate over the lines. At index 3 there is no line and the first conditional triggers. Should that not be an empty line? e.g. “”

Then the loop actually goes one more element to 4, and shows a the contents of a function.

That is I get – five alerts:

0: "An item with this x Id already exists."
1: "An item with this y id already exists."
2: "An item with this barcode already exists."
Error!

The last one is most bizarre:

hasObject: "function(o) {
    var l = this.length + 1;
    ... more lines ...
}

I don’t understand what is happening here. Why is it iterating over one more element? And why is the last element a function? And shouldn’t offset 3 be an empty string? That is I should not be alerting “Error!” here.