operators - What does =~ do in Perl? - Stack Overflow
51 I guess the tag is a variable, and it is checking for 9eaf - but does this exist in Perl? What is the "=~" sign doing here and what are the "/" characters before and after 9eaf doing?
How can I parse command-line arguments in a Perl program?
I'm working on a Perl script. How can I parse command line parameters given to it? Example: script.pl "string1" "string2"
Perl: Use s/ (replace) and return new string - Stack Overflow
In Perl, the operator s/ is used to replace parts of a string. Now s/ will alter its parameter (the string) in place. I would however like to replace parts of a string befor printing it, as in pri...
How do I perform a Perl substitution on a string while keeping the ...
In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in a different variable, without changing the original? I usually just copy the string to a new …
How do you round a floating point number in Perl?
Output of perldoc -q round Does Perl have a round () function? What about ceil () and floor ()? Trig functions? Remember that int() merely truncates toward 0. For rounding to a certain number of digits, …
In Perl, how can I read an entire file into a string?
Jun 5, 2009 · In Perl, how can I read an entire file into a string? Asked 16 years, 6 months ago Modified 4 months ago Viewed 204k times
How do I compare two strings in Perl? - Stack Overflow
In short: Perl doesn't have a data-type exclusively for text strings use == or !=, to compare two operands as numbers use eq or ne, to compare two operands as text There are many other functions and …
What is the significance of an underscore in Perl ($_, @_)?
The difference is that when no variable is supplied for the loop, Perl automatically sets the default $_ to provide each item. Similarly when calling subroutines (or methods - {subroutine in an object}) Perl …
What's the safest way to iterate through the keys of a Perl hash?
If I have a Perl hash with a bunch of (key, value) pairs, what is the preferred method of iterating through all the keys? I have heard that using each may in some way have unintended side effects.
What's the difference between Perl's backticks, system, and exec?
You can find documentation about it in perlfunc. backticks like system executes a command and your perl script is continued after the command has finished. In contrary to system the return value is …