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MathGroup Archive 2012

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Re: how to make a list of rules with 2 other lists composed by different kinds of elements

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  • Subject: [mg127119] Re: how to make a list of rules with 2 other lists composed by different kinds of elements
  • From: "djmpark" <djmpark at comcast.net>
  • Date: Sun, 1 Jul 2012 02:08:53 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <14998251.53693.1341049324870.JavaMail.root@m06>

list1 = {1, 2, 3};
list2 = {"file1", "file2", "file3"}; 

Thread[list1 -> list2] 

Inner[Rule, list1, list2, List] 


David Park
djmpark at comcast.net 
http://home.comcast.net/~djmpark/index.html 




From: Joug Raw [mailto:jougraw at gmail.com] 


Dear all,

I want to generate a list composed by rules. That is,

I have two list
First one:
list1={1, 2, 3}
The elements of this list are Integers.
Map[Head, list1] = {Integer, Integer, Integer}

Second one:
list2= {"file1", "file2", "file3"}
The elements of this list are Strings.
Map[Head, list2] = {String, String, String}


What I want is to have a new list like
list3= {1 -> "file1", 2 -> "file2", 3 -> "file3"} Map[Head, list3] = {Rule,
Rule, Rule}

Yes, of cause I can generate a list of rule manually. But what I have are
two big list of many elements and they are the output of other codes. So, in
real life this would be a part of big program. That is why I want to
generate the rule list automatically from list1 and list2. How could I do
this in a simple way? Thank you for your help.

Best regards,
Joug




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