Length and Drop

*To*: mathgroup at smc.vnet.net*Subject*: [mg32183] Length and Drop*From*: "Steve Gray" <stevebg at adelphia.net>*Date*: Fri, 4 Jan 2002 05:03:59 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

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?

**Follow-Ups**:**Re: Length and Drop***From:*Adriano Pascoletti <pascolet@dimi.uniud.it>

**Re: Length and Drop***From:*jmt <jmt@agat.net>