Re: Swap Ascii chr() for null string

[ikegami]

Works for me.

$ perl -e'
   my $String = "xxxchr12yyy";
   $String =~ s/chr(12)//g;
   CORE::say $String;
'
xxxyyy

[PriNet]

not the string 'chr12', the ascii character (12)...

[ikegami]

But you told it to match the string chr12! You can't place code in a string literal and expect it to be executed.

You want any of the following:

s/\014//g;            # By octal
s/\x0C//g;            # By hex
s/\x{C}//g;           # By hex (leading zeros allowed)
s/\N{U+C}//g;         # By hex (leading zeros allowed)
s/\N{FORM FEED}//g;   # By name
s/\N{FF}//g;          # By alias

You could also use the character literally.

my $ff = chr(12);
s/\Q$ff\E//g;

[roboticus]

PriNet:

You can't have arbitrary code in the left of a substitution regular expression. (If you use the e modifier, though, you can do so on the right side.)

So you either need to use interpolation:

$form_feed = chr(12);
$var =~ s/$form_feed//g;

Or you can just specify the value using a hex or octal literal \x0c or \014:

$var =~ s/\014//g;

...roboticus

When your only tool is a hammer, all problems look like your thumb.