Re: Sort problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg81709] Re: Sort problem*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Tue, 2 Oct 2007 05:31:26 -0400 (EDT)*Organization*: Uni Leipzig*References*: <fdqd33$n6m$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, you think that symbol1 < symbol2 is evaluated to True or False but this is not the case and a<r is left unevaluate as symbolic expression and can't used as an order relation. Can you explain whar a<r should mean ? Regards Jens Donald DuBois wrote: > Hello, > > This Sort works > > In[32]:= Sort[{r, a, x}] > > Out[32]= {a, r, x} > > but this one doesn't: > > In[33]:= Sort[{{r, 2}, {a, 3}, {x, 4}}, #1[[1]] < #2[[1]] &] > > Out[33]= {{r, 2}, {a, 3}, {x, 4}} > > > What am I doing wrong? > > Don >