Origin of discouraged perl idioms: &x(...) and sub x($$) { ... }
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Published on 2010-05-16T12:35:48Z
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2010/05/16
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|coding-style
In my perl code I've previously used the following two styles of writing which I've later found are being discouraged in modern perl:
# Style #1: Using & before calling a user-defined subroutine
&name_of_subroutine($something, $something_else);
# Style #2: Using ($$) to show the number of arguments in a user-defined sub
sub name_of_subroutine($$) {
# the body of a subroutine taking two arguments.
}
Since learning that those styles are not recommended I've simply stopped using them.
However, out of curiosity I'd like to know the following:
- What is the origin of those two styles of writing? (I'm sure I've not dreamt up the styles myself.)
- Why are those two styles of writing discouraged in modern perl?
- Have the styles been considered best practice at some point in time?
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