Perl script reveals math trick
MIND GAMES
A trick that anybody can learn lets you determine the day of the week from the date. We’ll apply some Perl technology to discover whether the method is reliable.
Recently, I was reading Mind Performance Hacks and stumbled across Hack Number 43, which explains how to determine the day of the week for any given date. The method is attributed to Lewis Carroll], the author of Alice’s Adventures in Wonderland. Simply calculate four values, one after the other, for the year, month, and day, and a fourth value as an adjustment factor. Then add the values, divide by 7, and the remainder amazingly gives you the day of the week as a number between zero (Sunday) and six (Saturday).
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
News
-
GitLabs Drops Pricing after Microsoft, GitHub Acquisition
GitLabs is creating more incentives for users to switch from GitHub.
-
KDE Plasma 5.13 Is Here
The desktop environment is designed to be more resource efficient.
-
SUSE Forks Red Hat’s Spacewalk Project
SUSE relies heavily on the project for its own SUSE Manager.
-
openSUSE Leap 15 Announced
The release was announced at the openSUSE Conference in Prague, Czech Republic.
-
SoftMaker FreeOffice 2018 for Linux
SoftMaker Software GmbH has announced FreeOffice 2018, a free of cost office suite for Linux.
-
A New CentOS
Latest version of the community Linux based on Red Hat Enterprise Linux 7.5
-
Ubuntu 18.04 Released
“Bionic Beaver” comes with hardware-focused improvements and Gnome as the default shell.
-
Richard Stallman Calls Azure Sphere OS a Positive Step
Stallman is glad that Microsoft will respect user’s freedom.
-
Red Hat Enterprise Linux 7.5 Released
The latest release is focused on hybrid cloud.
-
Microsoft Releases a Linux-Based OS
The company is building a new IoT environment powered by Linux.