Question

The TWiki plugin template uses extractNameValuePair to get the parameters with the variable.

The code construct suggests:

    $tmp = TWiki::Func::extractNameValuePair( $args, "headerrows" );
    $headerRows = $tmp if( $tmp );

This protects agains assigning undef variables. AND it also makes it impossible to return "" and 0

extractNameValuePair initialises the return variable as ""; As a consequence, using if (defined $tmp ) will always return TRUE.

Is it possible to initialise the return value from extractNameValuePair as undef ( $value );

That way variables that are set to "" and to 0 are returned and set correctly.

regards...

Environment

-- BramVanOosterhout - 21 Jan 2006

Answer

If you answer a question - or someone answered one of your questions - please remember to edit the page and set the status to answered. The status selector is below the edit box.

True if you expect something else than a number, although headerrows suggests a number. Where did you find this?

-- PeterThoeny - 21 Jan 2006

I took the construct from TablePlugin.

I checked again and saw that there the construct varies depending on the type of data expected.

So it checks $tmp ne ""; $tmp <1; etc.

I think I take a leaf out of that book and extend the tests.

Thanks for waking me up!

-- BramVanOosterhout - 22 Jan 2006