do BLOCK
Not really a function. Returns the value of the last command in the
sequence of commands indicated by BLOCK. When modified by a loop
modifier, executes the BLOCK once before testing the loop condition.
(On other statements the loop modifiers test the conditional first.)
do SUBROUTINE(LIST)
A deprecated form of subroutine call. See perlsub.
do EXPR
Uses the value of EXPR as a filename and executes the contents of the
file as a Perl script. Its primary use is to include subroutines
from a Perl subroutine library.
do 'stat.pl';
is just like
eval `cat stat.pl`;
except that it's more efficient, more concise, keeps track of the
current filename for error messages, and searches all the ™I
libraries if the file isn't in the current directory (see also the @INC
array in Predefined Names entry in perlvar). It's the same, however, in that it does
reparse the file every time you call it, so you probably don't want to
do this inside a loop.
Note that inclusion of library modules is better done with the
use() and require() operators.
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