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"
regex - What is /^ and /i in Perl? - Stack Overflow
The match operator is the syntax that tells the Perl interpreter: here comes a regex. In Perl, the match operator is normally delimited by '/' at start and end, but you can use delimiters (e.g., m{^foo}).
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, …
Should I use \\d or [0-9] to match digits in a Perl regex?
Per perldoc perluniintro, Perl does not support using digits other than [0-9] as numbers, so I would definitely use [0-9] if the following are both true: You want to use the result as a number (such as …
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 …
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
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.