Overview - Chapter: 0:History, 1:Design, 2:Basics, 3:Var, 4:Op, 5:IO, 6:{}, 7:Sub, 8:OOP, 9:Rx, 10:Meta
Intro - Appendices: A:Index, B:Tables, C:Cook, D:Delta, E:Best of, F:Links
Herbert Breunung: Inside a shell might be a Perl.
This tablet is about the old core business of Perl.
Command Line
The shell, command line (or STDOUT to Perl 5 programmer and $*OUT in Perl 6) is the first and most fundamental communication device for a script with it's user. And most tutorials begin just with putting a line to that black window.
say
say "dear earthlings";
This just drops a quoted string but any other kind of value is possible. say will just append an invisible newline character, according to you operating system. So every time you "say" something, it will start on a fresh line.
You can also give say a list of values. Each item will be taken as an expression, that has to evaluated. The results will be combined, just like with ~ and the \n will be added on the end.
say "dear earthlings, we come from ", $our_home_planet, ",that is ", compute_distance($earth, $our_home_planet), 'parsecs away.';
printf
It's a print that understands also the syntax of sprintf.
note
warn
promt
read
Files
slurp
lines
open
readline
get
getc
read for files
print for files
say for files
open
Synopsis:
open('new', :w).close
given open('foo', :w) { # "Anonymous" filehandle.say('Hello, world!');}
.close
Valid modes are:
r : read
w : write
a : append (Note: you must specify "wa", not just "a")
p : pipe
close
rename for files
Directories
dir
mkdir
chdir
chroot
rmdir
rename
Sockets
Processes
run
runinstead
fork
wait
kill
Overview - Chapter: 0:History, 1:Design, 2:Basics, 3:Var, 4:Op, 5:IO, 6:{}, 7:Sub, 8:OOP, 9:Rx, 10:Meta
Intro - Appendices: A:Index, B:Tables, C:Cook, D:Delta, E:Best of, F:Links
