> > Lists are preserved in Tcl as arrays of Tcl_Obj's. If I do the
following:
> >
> > proc makeList {size} {
> > set output ""
>
> Is there any difference in initializing output to list at first, or is
> there no difference. IOW, should I initialize 'output' to a list object,
> or does 'set output ""' just create an untyped object?
>
> set output [list] <--- does this have any affect?
At this point no, although future improvements in post-processing of
bytecodes (bc-optimization) could cause that to be significant.
Right now:
1: set output ""
2: set output {}
3: set output [list]
all create *untyped* empty objects. Doing a lappend or append on them
causes very little overhead in typing the object. It's more a matter of
style, and sometimes I do write 'set output [list]'. Some people use
'set output ""' to indicate a simple var vs. 'set output {}' for list
vars (since lists uses {}s in their stringified form).
Jeff Hobbs The Tcl Guy
Senior Developer http://www.ActiveState.com/
Tcl Support and Productivity Solutions
