ES2 MUD LIB :: 東方故事二(ES2) 天朝帝國 mudlib 瀏覽展示
/doc/efuns/nullp
nnnnuuuullllllllpppp((((3333)))) MMMMuuuuddddOOOOSSSS ((((5555 SSSSeeeepppp 1111999999994444)))) nnnnuuuullllllllpppp((((3333))))
NNNNAAAAMMMMEEEE
nullp() - determine whether or not a given variable is null.
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
int nullp( mixed arg );
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
Return 1 if `arg' is null. 'arg' will be null in the
following cases:
1. it has not yet been initialized.
2. it points to a destructed object.
3. it is a function (formal) parameter that corresponds to
a missing actual argument.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
mapp(3), stringp(3), pointerp(3), objectp(3), intp(3),
bufferp(3), floatp(3), functionp(3), undefinedp(3),
errorp(3)
Page 1 (printed 3/16/95)