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SW-22 New methods for collections #34

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lstypka opened this issue Jul 24, 2013 · 0 comments
Closed
4 tasks

SW-22 New methods for collections #34

lstypka opened this issue Jul 24, 2013 · 0 comments

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@lstypka
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lstypka commented Jul 24, 2013

  • duplicates(Collection<?>, String property) - search duplicates by given property, not by reference
  • unique(Collection<?>, String property) - the same as above, but there is returned list of unique elements
  • List<List> group(Collection, String fieldName) - returns list of groups, created by given value of field
  • List<List> group(Collection, String ... fieldNames) - returns list of groups, created by given value of fields
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