string does not contain

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: string does not contain by pfaut (Priest) on Jan 22, 2003 at 15:34 UTC
You can use `!~` instead of `=~`. So, `$string !~ "hello"` would return true if the string doesn't contain "hello". See perlop (perldoc perlop) for more information on operators. `--- print map { my ($m)=1<<hex($_)&11?' ':''; $m.=substr('AHJPacehklnorstu',hex($_),1) } split //,'2fde0abe76c36c914586c';` [download]	[reply] [d/l] [select]
Re: string does not contain by broquaint (Abbot) on Jan 22, 2003 at 15:37 UTC
Just use the negated version of the regex match operator `!~` e.g `my $string = "foo bar baz"; print "no hello" if $string !~ /hello/; __output__ no hello` [download] See. `perlop` for more info. HTH `_________ broquaint`	[reply] [d/l]
Re: string does not contain by aging acolyte (Pilgrim) on Jan 22, 2003 at 15:41 UTC
TMTOWTDI negate the if to an unless: `my $string = "foo bar baz"; print "no hello" unless $string =~ /hello/;` [download] A.A.	[reply] [d/l]
Re: string does not contain by fredopalus (Friar) on Jan 22, 2003 at 15:46 UTC
You may also want to look at perldoc perlretut. It explains the two operators (=~ and !~) right in the beginning.	[reply]
Re: string does not contain by Hofmator (Curate) on Jan 23, 2003 at 13:07 UTC
... and as nobody mentioned it so far, if you just match against a literal string like 'hello', then you could also use the index function: `# if 'hello' not contained in $string if ( index($string, 'hello' ) == -1) { # do something }` [download] -- Hofmator	[reply] [d/l]
Re: string does not contain by OM_Zen (Scribe) on Jan 22, 2003 at 17:29 UTC
Hi , `$string !=~ /hello/ or unless($string =~ /hello/)` [download] or that implies if not or a negate logic shall work for the not parsing a string value	[reply] [d/l]
Re: Re: string does not contain by petral (Curate) on Jan 22, 2003 at 23:50 UTC
Close. Actually, `$string !~ /hello/` or `! ( $string =~ /hello/ )` p	[reply] [d/l] [select]