Author Topic: Global variable vs Pass by reference (Read 2440 times)

TehKyle · « **on:** May 20, 2011, 02:49:55 am »

Is it better to have RenderWindow as global variable or send it as reference to the function?

Map.Draw(&AppWindow) looks wonky and wondering if there is better way to code

OniLinkPlus · « **Reply #1 on:** May 20, 2011, 04:21:45 am »

Send it as a reference.

Nexus · « **Reply #2 on:** May 20, 2011, 12:43:31 pm »

Use pointers or references. Avoid global variables where possible.

xazax · « **Reply #3 on:** May 20, 2011, 01:17:37 pm »

What about singletons?

Nexus · « **Reply #4 on:** May 20, 2011, 02:06:18 pm »

Quote from: "xazax"

What about singletons?

Singletons are global variables. They share a lot of their problems, it's just that some people consider singletons a good solution because they are object-oriented. Their original intention was to ensure single instances, however they are often overused and abused as "better" global variables.

The best option is to keep dependencies as local as possible, therefore you should normally prefer passing function arguments.