Building Browsergames - Latest Comments in Saving Database Space through Bit-masking

Re: Saving Database Space through Bit-masking

Jorge — Thu, 02 Oct 2008 14:32:03 -0000

I am using the same logic on a project, a very quick way to get around using reference tables. Good article, great ammunition in the tech group for my idea!

Re: Saving Database Space through Bit-masking

gostyloj — Sat, 13 Sep 2008 19:55:22 -0000

Good point Mattias. Just to explain a bit further what the operator notation is, the '&' will do a bit comparison where both members in the comparison need to have that bit set to 1. Because you are doing the AND operator all the bit places you don't care about need to be set to 1 so they maintain their value. The '~' operator inverts all the bits in the value so where a variable might look like 00010000, the inverse of that would look like 11101111.

Re: Saving Database Space through Bit-masking

Mattias — Sat, 13 Sep 2008 13:33:45 -0000

Might want to note that in order to take off one of the researches (for some unknown reason) you need to AND with the complement of the bit.
For example, if you had picked the g_shield_research and want to degrade it or something you use:

$newPlayerResearch = $element->research &~$g_shield_research;

Re: Saving Database Space through Bit-masking

Blair Beckwith — Fri, 05 Sep 2008 07:58:38 -0000

These tutorials are simply amazing! Thank you do much for writing them! You definately have a new fan.