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if condition, literal spaces and timer evaluations #271251 27/01/23 10:02 PM
Joined: Jul 2006 Posts: 4,149 France W Wims OP Hoopy frood
OP Wims Hoopy frood W Joined: Jul 2006 Posts: 4,149 France	Today I figured there was actually an issue when handling local %variables in a timer. When a timer fires, the local variables that existed in the scope when the /timer was called are long gone and don't exist anymore, so in order to prevent double evaluation, $unsafe must be used so that the content of the variables is seen when /timer is seen, not when it fires. if (%localvar != $null) { command } vs .timer -ho 1 0 if ( $unsafe(%localvar) ) command this works when the variable has a content, but when it's $null, you get /if invalid format, because all the timer sees if ( ) command. This is a bit annoying, not going to lie! If the parameter passed to $unsafe() is $null, would it be possible to still return a plain text $unsafe().undo so that a future evaluation would turn that into $null, allowing timers to correcly handle these situations, there's many more if condition formats that fail depending on where $unsafe() is used. I'm well aware of the idea of using an alias and doing the job in an alias but that's not the point here. #mircscripting @ irc.swiftirc.net == the best mIRC help channel

Re: if condition, literal spaces and timer evaluations Wims #271256 28/01/23 05:25 PM
Joined: Jan 2004 Posts: 2,127 maroon Hoopy frood
maroon Hoopy frood Joined: Jan 2004 Posts: 2,127	//var -s %a $unsafe(a) * Set %a to $unsafe(YQ==).undo //var -s %a $unsafe(%null) * Set %a to It looks like $unsafe is an alias that behaves like Code alias makesafe { if (.prop == undo) returnex $decode($1,m) var %string $encode($1,m) return $ $+ makesafe( $+ %string $+ ).undo } The handler for .undo obviously has no trouble when the input string is blank, but if there is a problem inside the code where it doesn't like creating the .undo string to be blank, assuming .undo is being handed to the subroutine handling $decode, can simply make the string be a single base64 symbol, which $decode would return as the empty string. So the final return could be preceded by: Code if (%string == $null) var %string A So the solution is to have $unsafe($null) return either $unsafe().undo or $unsafe(A).undo

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