Dec 30, 2010 · 128 perldoc perlvar is the first place to check for any special-named Perl variable info. Quoting: @_: Within a subroutine the array @_ contains the parameters passed to that subroutine. …

Sep 5, 2012 · What's the use of <> in Perl. How to use it ? If we simply write <>; and while (<>) what is that the program doing in both cases?

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.

I'm working on a Perl script. How can I parse command line parameters given to it? Example: script.pl "string1" "string2"

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 …

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 …

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, …

Jan 4, 2011 · Is there a built-in function to trim leading and trailing whitespace such that trim(" hello world ") eq "hello world"?

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.

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.