Re: [Tcllib-devel] gsoc'09 - Re: Graph Manipulations

[Kevin K. <ke...@ac...>]

Andreas Kupries wrote:
> 1. What about infinity values... In my implementation of Bellman Fords I 
>> just added string "inf", as a value of infinity ( in initialization we 
>> assign value of infinity on each distance we are searching for). Is it 
>> okay, or you've got other way to assign those values?
> 
> Let me check something ... I believe that in Tcl 8.5 we have standard strings 
> for the infinities already. Matching these would be a good thing, even if we 
> are working with Tcl 8.4 ...
> 
> 	% tclsh
> 	% info patchlevel
> 	8.5.7
> 	% expr log(0)
> 	-Inf
> 
> Yes. The standard strings are "Inf" and "-Inf".
> 
> Kevin, do you have anything to add here, as one of the guys knowing the math 
> stuff in the Tcl core better than most ?

Nothing you didn't already say. Inf and -Inf are parsed as floating
point numbers.

-- 
73 de ke9tv/2, Kevin