|Do you know where your variables are?|
HTML::Template Interpolation Error?by hbo (Monk)
|on Aug 16, 2004 at 20:58 UTC||Need Help??|
hbo has asked for the
wisdom of the Perl Monks concerning the following question:
Some code I wrote came back to me today with the complaint that it was blowing up with an error:
The code in question looked like this:
So it looks like the 'rcadd_list' parameter is getting swallowed. To make a long story short, changing the code like this:
Fixed it up.
I'm relying on interpolating the return value of a CGI call into the parameter list of an HTML::Template call throughout this code, not to mention throughout my career. Why does it fail in this case?
blokhead supplied my answer.
checkbox_group() returns a list in list context. HTML::Template::param takes a list of key/value pairs. The first pair was thus
where the second parameter is the first <input> tag returned by the checkbox_group call. But then the next <input> tag becomes a parameter tag for HTML::Template::param(), which is totally fubar.
Prepending an empty string as above forced scalar context, which made checkbox_group return a space-seperated list of input tags, which was just what I wanted. I ended up changing the code like so:
Which makes the whole thing more explicit, in case anyone as thick as I comes along to work on this in the future. 8)
Thanks to blokhead for the correct answer!
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