Re: Length and Drop

*To*: mathgroup at smc.vnet.net*Subject*: [mg32215] Re: Length and Drop*From*: "Steve Gray" <stevebg at adelphia.net>*Date*: Sun, 6 Jan 2002 03:38:31 -0500 (EST)*References*: <a13vdg$dgm$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Thanks to all who answered. I found this obvious error soon after I made the post. "Steve Gray" <stevebg at adelphia.net> wrote in message news:a13vdg$dgm$1 at smc.vnet.net... > The following sequence seems wrong to me, in that > after dropping some elements from a list, its Length is > still the same. I copied this directly from the notebook > but removed the In[] and Out[] statements. > > > timexp={{0,0}} -> {{0,0}} [this is ok] > > timexp=Append[timexp,{7,8}] -> {{0,0},{7,8}} [this is ok] > > Length[timexp] -> 2 [this is ok] > > Drop[timexp,1] -> {{7,8}} [this is ok] > > Length[timexp] -> 2 [ this is what I did not expect!] > > Should not Drop reduce the Length of the list by the amount > dropped? > >