Edward Oakley fatchild

Perl 7 FAQ

last updated 2025-01-16

Is Perl 7 coming?

It has been the plan that this version number will be used for Perl at some point in the future.

As of 2025, there is now a proposal to use the second component of the Perl version number as the major version, skipping over the question of what Perl 7 should or should not be.

Copy from http://www.jaspan.com:80/improved_persistent_login_cookie_best_practice

Charles Miller's article, "Persistent Login Cookie Best Practice,"[1] describes a relatively secure approach to implementing the familiar "Remember Me" option for web sites. In this article, I propose an improvement that retains all the benefits of that approach but also makes it possible to detect when a persistent login cookie has been stolen and used by an attacker.

Review

To summarize Miller's design:

When the user successfully logs in with Remember Me checked, a login cookie is issued in addition to the standard session management cookie.[2] The login cookie contains the user's username and a random number (the "token" from here on) from a suitably large space. The username and token are stored as a pair in a database table.

List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

Tabs and Windows

Function	Shortcut
New Tab	`⌘` + `T`
Close Tab or Window	`⌘` + `W` (same as many mac apps)
Go to Tab	`⌘` + `Number Key` (ie: `⌘2` is 2nd tab)
Go to Split Pane by Direction	`⌘` + `Option` + `Arrow Key`
Cycle iTerm Windows	`⌘` + `backtick` (true of all mac apps and works with desktops/mission control)

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

Separate big codebases into multiple repositories.

	#!/usr/bin/env perl

	use strict;
	use warnings;

	use Benchmark qw(cmpthese);

	cmpthese shift \|\| -3, {
	"shift" => sub {
	my $arg = shift;