Replacing elements in a list
- To: mathgroup at smc.vnet.net
- Subject: [mg90092] Replacing elements in a list
- From: yedidel at gmail.com
- Date: Sat, 28 Jun 2008 05:54:31 -0400 (EDT)
Hello, I have a list of pairs that looks like this: {{1,2},{3,4},{1,{1,2}}} Each pair element can be a pair by itself. I have another list which lists all elements possible: {1,2,3,4,{1,2}} Now I want to create a list of rules that will take the element list and give it a running number ({1,2} will be 5 in this example) after that I want to apply those rules to the pair list BUT that will do it only from the second level down. This means that the final result should be: {{1,2},{3,4},{1,5}} without the first pair {1,2} changing to 5 because it is a pair and not an element.
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