Re: converting from switch to given-when


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Re: converting from switch to given-when

by tobyink (Canon)

on Sep 25, 2012 at 06:07 UTC ( [id://995491]=note: print w/replies, xml )

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in reply to converting from switch to given-when

Try this:

given ($selection) {
  when ([wxID_YES])    { $self->Wx::LogStatus('You pressed: "Yes"'   )
+ }
  when ([wxID_NO])     { $self->Wx::LogStatus('You pressed: "No"'    )
+ }
  when ([wxID_CANCEL]) { $self->Wx::LogStatus('You pressed: "Cancel"')
+ }
}
[download]

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

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Re^2: converting from switch to given-when
by tobyink (Canon) on Sep 25, 2012 at 06:26 UTC

PS: if there's any possibility that $selection could potentially contain an arrayref, then my solution might behave a little oddly; you could explicitly protect against arrayrefs:

sub is_arrayref (_) { ref(shift) eq 'ARRAY' }

given ($selection) {
  when (is_arrayref)   { die "unexpected!" }
  when ([wxID_YES])    { $self->Wx::LogStatus('You pressed: "Yes"'   )
+ }
  when ([wxID_NO])     { $self->Wx::LogStatus('You pressed: "No"'    )
+ }
  when ([wxID_CANCEL]) { $self->Wx::LogStatus('You pressed: "Cancel"')
+ }
}
[download]

Of course, probably the code that generates $selection can never generate an arrayref, so you don't need to protect against that possibility.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'g

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