Re: Detect Two Strings in File

my $str1 = qr(C);
my $str2 = qr(X);

my $alert = 0;
while (<DATA>) {
        $alert = 1 if /$str1/;
        $alert = 0 if /$str2/;
}
print "P A N I C" if $alert;

__DATA__
A
B
C
D
E
F
[download]

Comment on Re: Detect Two Strings in File Download Code

Replies are listed 'Best First'.
Re^2: Detect Two Strings in File by choroba (Archbishop) on Nov 05, 2014 at 21:51 UTC
The OP didn't specify what to do if the first string isn't found. If it's not ok, set $alert to 1 before entering the loop. لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]
Re^2: Detect Two Strings in File by CountZero (Bishop) on Nov 06, 2014 at 05:26 UTC
Your program will not alert in case it finds the second string but never found the first string. The OP indeed did not state clearly what he wants in that case, but whatever he wants, your program cannot distinguish that case. CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James My blog: Imperial Deltronics	[reply]


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