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#######
#
# E-scripts on some specific topics on Perl.
#
# Note 1: use the eev command (defined in eev.el) and the
# ee alias (in my .zshrc) to execute parts of this file.
# Executing this file as a whole makes no sense.
#
# Note 2: be VERY careful and make sure you understand what
# you're doing.
#
# Note 3: If you use a shell other than zsh things like |&
# and the for loops may not work.
#
# Note 4: I always run as root.
#
# Note 5: some parts are too old and don't work anymore. Some
# never worked.
#
# Note 6: the definitions for the find-xxxfile commands are on my
# .emacs.
#
# Note 7: if you see a strange command check my .zshrc -- it may
# be defined there as a function or an alias.
#
# Note 8: the sections without dates are always older than the
# sections with dates.
#
# This file is at <http://angg.twu.net/e/perl1.e>
#           or at <http://angg.twu.net/e/perl1.e.html>.
#        See also <http://angg.twu.net/emacs.html>,
#                 <http://angg.twu.net/.emacs[.html]>,
#                 <http://angg.twu.net/.zshrc[.html]>,
#                 <http://angg.twu.net/escripts.html>,
#             and <http://angg.twu.net/>.
#
#######




# (find-pl5pod "toot" "ISA")

# (find-pl5pod "func" "=item package")
# (find-pl5pod "mod" "=head2 Packages")
# (find-pl5pod "faq7" "=head2 What's a closure?")
# (find-pl5pod "diag" "tainting mechanism")
# (find-pl5pod "data" "Typeglobs")
# (find-pl5pod "data" "local *FH;  # not my!")

# (find-pl5pod "ref")
# (find-pl5pod "sub")
# (find-pl5pod "mod" "Symbol Tables")

# (find-pl5pod "func" "=item ref EXPR")
# (find-pl5pod "func" "=item bless")
# (find-pl5pod "obj" "bless")

# (find-pl5pod "func" "=item eval EXPR")
# (find-pl5pod "func" "eval { $x };	# CASE 4")
# (find-pl5pod "func" "=item my EXPR")
# (find-pl5pod "func" "=item local")

# (find-pl5pod "sub" "=head2 Temporary Values via local()")
# (find-pl5pod "sub" "=head2 Private Variables via my()")


# (find-pl5pod "func" "=item use Module")

perl <<'---'
print "foo\n";
---

perl <<'---'
my $a = 12;
eval 'print "$a"; $a = 25';
print "$a\n";
---

perl <<'---'
use strict;
my $a = 12;
print "$a\n";
---

perl <<'---'
use strict;
sub foo { return eval $_[0]; }
my $a = 12;
local $b = 25;
$::c = 30;
print((foo '$a'), (foo '$b'), (foo '$c'), "\n");
---

# (find-pl5pod "diag" "requires explicit package name")
# (find-pl5pod "mod" "=head2 Packages")
# (find-pl5pod "func" "=item use Module")
# (find-pl5pod "func" "=item require")
# (find-pl5pod "func" "=item do")
# (find-pl5pod "func" "=item import")
# (find-pl5pod "func" "=item package")
# (find-pl5pod "var" "=item %INC")

Idéias: posso ou switchar imediatamente para a package Main ou usar o
'do'.



perl <<'---'
use Data::Dumper;
sub wdump { print "\n$_[0] :\n", Dumper($_[1]); }
wdump '%::', \%::;
wdump '%INC', \%INC;
---




######
#
# "#!"-files
#
######

# (find-fline "~/PERL/lasagna")
# (find-fline "~/PERL/lasagna2")

cd /home/root/PERL/

cat > lasagna <<'---'
#!/usr/bin/perl
use Data::Dumper;
print Dumper([$0, @ARGV]);
---
chmod 755 lasagna

cat > lasagna2 <<'---'
#!/home/root/PERL/lasagna
woo
bletch
---
chmod 755 lasagna2

lasagna2 foo bar
lasagna2 ''








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