PERLReadEvalPrint

A simple read-eval-print sort loop in PERL.

#!/usr/bin/perl -w
use strict;

my @scripts = qw/reverse amplify stretch permute/;

sub pick {
	# return a random element from an array
	return $_[int(rand(@_))];
}

while (1) {
	system("clear");
	print "*****\n";
	print "welcome\n";
	print "*****\n";
	print "press a key to continue:\n";
	system("mplayer /usr/share/sounds/KDE_Beep_Yo.wav > /dev/null 2> /dev/null");
	my $line = <STDIN>;

	# PICK RANDOM SCRIPT
	my $script = pick(@scripts);

	# READ LINES FROM KEYBOARD
	system("clear");
	print "*****\n";
	print "Running $script\n";
	print "*****\n";
	print "type some input, and end with Ctrl-D\n";
	print "\n";
	system("mplayer /usr/share/sounds/KDE_Keyboard_Key_1.ogg > /dev/null 2> /dev/null");
	my @lines = ();
	while (1) {
		$line = <STDIN>;
		if ($line eq "\n") { last };
		push(@lines, $line);
	}

	# RUN SCRIPT AND FEED LINES TO THE SCRIPT (goes to STDIN of script)
	my $writeme;
	open $writeme, "|-", "./$script";
	foreach (@lines) {
		print $writeme $_;
	}
	close($writeme);
	system("mplayer /usr/share/sounds/KDE_Pop.ogg > /dev/null 2> /dev/null");

	print "\n";
	print "DONE\n";
	sleep(5);
}