operators - What is the difference between "||" and "or" in Perl ...
Nov 10, 2019 · 53 From Perl documentation: OR List operators On the right side of a list operator, it has very low precedence, such that it controls all comma-separated expressions found there.
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"
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 …
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, …
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 does exactly perl -pi -e do? - Stack Overflow
Jan 25, 2015 · Thus perl is looping over the lines in the given files, executes the code with $_ set to the line and prints the resulting $_. The magic variabe $^I is set to an empty string.
String compare in Perl with "eq" vs "==" - Stack Overflow
Dec 27, 2012 · String compare in Perl with "eq" vs "==" [duplicate] Asked 12 years, 11 months ago Modified 8 months ago Viewed 346k times
How can I print the contents of a hash in Perl? - Stack Overflow
Jul 21, 2009 · I keep printing my hash as # of buckets / # allocated. How do I print the contents of my hash? Without using a while loop would be most preferable (for example, a one-liner would be best).