[Solved] Simple vJass question..

[Geshishouhu]

Hi all.
What does "library_once" in vJass mean? Similar to "optional" or "require"?

 

[Nestharus]

library_once means that the library and its code will only be put into the map once. If you have multiple copies of that library, only one copy will be put into the map, the rest will be deleted.

options means that a library does not have to exist in a map, but if it does exist, then that library is put into the map before the library using it

require means that a library has to exist in a map and is put into the map before the library using it

 

[TriggerHappy]

When using library_once JassHelper ignores name conflicts with other libraries. For example:

library_once Table // this will be used
endlibrary
library_once Table // ignored
endlibrary
library_once Table // ignored
endlibrary

http://www.wc3c.net/vexorian/jasshelpermanual.html

 

[Geshishouhu]

When using library_once JassHelper ignores name conflicts with other libraries. For example:

library_once Table // this will be used
endlibrary
library_once Table // ignored
endlibrary
library_once Table // ignored
endlibrary

http://www.wc3c.net/vexorian/jasshelpermanual.html

Thanks for the exmaple.

library_once means that the library and its code will only be put into the map once. If you have multiple copies of that library, only one copy will be put into the map, the rest will be deleted.

options means that a library does not have to exist in a map, but if it does exist, then that library is put into the map before the library using it

require means that a library has to exist in a map and is put into the map before the library using it

Thanks. Actually I was reading the script of your DDS system and found this issue.