June 2002
Beginner
759 pages
80h 42m
English
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Name
goto
Synopsis
gotolabelgoto &name
Finds the statement labeled with
label (or an expression that evaluates
to a label) and resumes execution there. It may not be used to go
into any construct that requires initialization, such as a
subroutine or a foreach loop.
It also can’t be used to go into a construct that is optimized
away. It can be used to go almost anywhere else within the dynamic
scope, including out of subroutines, but for that purpose, it’s
usually better to use another construct, such as last or die.
goto & name
substitutes a call to the named subroutine for the currently
running subroutine. This is used by AUTOLOAD subroutines that wish to load
another subroutine and pretend that this subroutine—and not the
original one—had been called in the first place (except that any
modifications to @_ in the
original subroutine are propagated to the replacement subroutine).
After the goto, not even
caller will be able to tell
that the original routine was called first.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.