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How to say removing redundancy and/or duplicate entries from a list of items with a single word?

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Is this a programming question? short_list = unique(long_list); is the normal idiom. –  tchrist Apr 4 '13 at 17:44
    
No, it's not a programming question. –  Problemania Apr 4 '13 at 18:05
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That's too bad because uniquifying is good and proper programming slang for the process: en.wiktionary.org/wiki/uniquify –  Wayfaring Stranger Apr 4 '13 at 18:40

2 Answers 2

up vote 4 down vote accepted

deduplicate:

To eliminate redundant duplicate data from.

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Funny that it isn’t unduplicate. –  tchrist Apr 4 '13 at 18:06
    
@tchrist I would speculate that this is because the data haven't been actively duplicated, rather there just happen to be duplicates. There is no act of duplication to reverse as an un- prefix would imply, perhaps. –  donothingsuccessfully Apr 4 '13 at 19:15
    
@tchrist I appears I'm wrong about un- and de- :english.stackexchange.com/questions/25941/… –  donothingsuccessfully Apr 4 '13 at 19:19

"Pruning" a list or database is an expression I've heard several times.

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"Pruning" doesn't necessarily imply removing duplicates; it could also be used to describe, for example, removing old entries from a database. –  Wooble Apr 4 '13 at 18:18
    
True! It describes removing any unwanted stuff, not necessarily duplications. On the other hand, if my job involved going through a list or database and eliminating duplicates, I'd describe it as pruning. We're getting down to context, really. –  Roberta Davies Apr 4 '13 at 18:58

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