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Question: Null array from command map

Question:Null array from command map

Chia 155
April 08 2014
1

Hi All,

I used the command map to apply a procedure to elements of a array like this:

 

Why did I get the null array "[]"?

A vector was also used and got the similar result: 

 

I'd appreciate any help on this topic. Thank a lot.
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