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https://issues.apache.org/jira/browse/COLLECTIONS-448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart updated COLLECTIONS-448:
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Summary: Proposal for addinig random pick methods to Bags (was: [PATCH]
Proposal for addinig random pick methods to Bags)
> Proposal for addinig random pick methods to Bags
> ------------------------------------------------
>
> Key: COLLECTIONS-448
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-448
> Project: Commons Collections
> Issue Type: Wish
> Components: Bag
> Affects Versions: 4.0
> Reporter: Othmen Tiliouine
> Priority: Minor
> Labels: patch
> Fix For: 4.x
>
> Attachments: pickFromABag2.patch
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> Hello,
> This is a patch to add two methods to Bag interface and classes
> public E pick();
> public E pickAndRemit();
> as discussed in this mail.
> -----------------------------------------------------------------
> http://mail-archives.apache.org/mod_mbox/commons-dev/201303.mbox/%3CCAChO4O-YRE%3Db1%3D4hEK%2BuhvpV6-OD3F3apyRn3mwjvGzUEXe%2BaQ%40mail.gmail.com%3E
> I just saw the Bag interface and its implementations, I'm surprised that Bag
> <T> (and none of these implementations) expose the method
> public T pick() and public T pickAndRemit() (pick a random element)
> The Bag object we see in nature, it is mainly used to this, that's why it is
> widely used in the probability that when I met 2 white balls and one black,
> when I draw a ball randomly I have 2 times more likely to have a white ball
> I think that if this caracteristic exists it would be very valuable.
> ----------------------------------------------------------------------
> these methods pick a random element from the bag, The probability of picking
> a copy of a given element is proportional to the number of copies of this
> element in the bag.
> the diference between pick() and pickAndRemit() is that with pick() the
> picked element is removed from the bag.
> this is my first contribution on open source project
> if you accept to add this feature to bags and validate my patch i will
> propose one other patch to add this methods
> public Iterator<E> pick(int n); //pick random n element (with remove)
> public Iterator<E> pickAndRemit(int n) ; //pick random n element (without
> remove)
> -Question : should i regenerate the serialVersionUID of classes that i have
> changed ?
> Othmen Tiliouine
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