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Experimenting with modifiers for 'replace', e.g. all, last, first, second, etc; todo -- needs to remember positions of previous replacements

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Pragmatic Software 2010-05-16 04:41:02 +00:00
parent 525588b8f1
commit 24527569ab
1 changed files with 38 additions and 5 deletions
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43
modules/ideone.pl
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@ -2,6 +2,7 @@
# use warnings;
use strict;
use feature qw(switch);
use SOAP::Lite;
$SOAP::Constants::DO_NOT_USE_XML_PARSER = 1;
@ -135,9 +136,13 @@ while($subcode =~ s/^\s*(and)?\s*undo//) {
my $prevchange = $last_code[0];
my $got_changes = 0;
while($subcode =~ m/^\s*(and)?\s*replace\s*'.*'\s*with\s*'.*'/i) {
$got_sub = 1;
$subcode =~ s/^\s*(and)?\s*replace\s*//i;
while($subcode =~ m/^\s*(and)?\s*replace\s*([^']+)?\s*'.*'\s*with\s*'.*'/i) {
my $modifier = 'first';
$subcode =~ s/^\s*(and)?\s*//;
$subcode =~ s/replace\s*([^']+)?\s*//i;
$modifier = $1 if defined $1;
$modifier =~ s/\s+$//;
my ($from, $to);
my ($e, $r) = extract_delimited($subcode, "'");
@ -173,10 +178,38 @@ while($subcode =~ m/^\s*(and)?\s*replace\s*'.*'\s*with\s*'.*'/i) {
exit 0;
}
given($modifier) {
when($_ eq 'all' ) {}
when($_ eq 'last' ) {}
when($_ eq 'first' ) { $modifier = 1; }
when($_ eq 'second' ) { $modifier = 2; }
when($_ eq 'third' ) { $modifier = 3; }
when($_ eq 'fourth' ) { $modifier = 4; }
when($_ eq 'fifth' ) { $modifier = 5; }
when($_ eq 'sixth' ) { $modifier = 6; }
when($_ eq 'seventh') { $modifier = 7; }
when($_ eq 'eighth' ) { $modifier = 8; }
when($_ eq 'nineth' ) { $modifier = 9; }
when($_ eq 'tenth' ) { $modifier = 10; }
default { print "$nick: Bad replacement modifier '$modifier'; valid modifiers are 'all', 'first', 'second', ..., 'tenth', 'last'\n"; exit 0; }
}
my $ret = eval {
my $got_change;
while($code =~ s/(\b)$from(\b)/$1$to$2/) {
$got_change = 1;
if($modifier eq 'all') {
while($code =~ s/(\b)$from(\b)/$1$to$2/) {
$got_change = 1;
}
} elsif($modifier eq 'last') {
if($code =~ s/(.*)(\b)$from(\b)/$1$2$to$3/) {
$got_change = 1;
}
} else {
my $count = 0;
if($code =~ s/(\b)$from(\b)/if(++$count == $modifier) { "$1$to$2"; } else { "$1$from$2"; }/gex) {
$got_change = 1;
}
}
return $got_change;
};