Declaring variables once at the beginning of the code block where they are being first used is the best practice imo. One other alternative (yet poor) approach is to use the special $_
if ( $_ = $obj->get_id() )
# use $_ inside this block...
elsif ( $_ = $obj->create_id() )
# use $_ inside this block
Generally, however, this wouldn't be a very sound approach, as it is usually very easy to loose track of the $_
variable. Although, it does spare you having to declare variables, especially for short code blocks or loops.
pointed out (++), I stress
that the use of $_
is a bad
idea. I just wanted to show one alternative, albeit a bad
one as a means of warning against such approach. :)
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