Re: Select list elements and exchange them
- To: mathgroup at smc.vnet.net
- Subject: [mg109830] Re: Select list elements and exchange them
- From: chris <aarthur at tx.rr.com>
- Date: Wed, 19 May 2010 07:04:20 -0400 (EDT)
{ {11,{2,3}},{21,{3,4}},{34,{5,6}},{51,{7,8}} }/.{x_Integer,{3,4}}->{100,{3,4}} ishii.mitsuo.titanium at nsc.co.jp a =E9crit : Hi > I have a problem. > > > I have a list. > > testList=={ {11,{2,3}},{21,{3,4}},{34,{5,6}},{51,{7,8}} } > > 1) From this list, select any element list such as {x,{3,4}}, > > where X is an arbitrary number. > > > In general, position of {x,{3,4}} in "testList" is not fixed. > > 2) Select any element list such as {x,{3,4}} and then exchange {x,{3,4}} to {100,{3,4}}. > > 3)Make a new list finally. > > testListNew=={ {11,{2,3}},{100,{3,4}},{34,{5,6}},{51,{7,8}} } > > Please teach me how to solve. > > Thanks in advance. > > Mitsuo Ishii > > >