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MathGroup Archive 2010

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Select list elements and exchange them

  • To: mathgroup at smc.vnet.net
  • Subject: [mg109804] Select list elements and exchange them
  • From: ishii.mitsuo.titanium at nsc.co.jp
  • Date: Tue, 18 May 2010 06:12:25 -0400 (EDT)

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


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