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Patch for ActiveSupport that Array#uniq and #uniq! supports blocks
#1595
I found it useful when i wanted to ensure that array has no duplicate values while somehow transforming them, but not affecting original array so I wrote a patch that provides uniq and uniq! block support
# Same as Array#uniq but accepts block argument which result will
# be used for determining which values are unique.
#
# a = ['a', 'A', 'bb', 'bB', 'Bb', 'Cc', 'cc']
# a.uniq { |i| i.downcase } # => ["a", "bb", "Cc"]
Github commit: http://github.com/arturaz/rails/...
The append features part is lame, I think it should be rewritten somehow :)
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array_uniq.patch
2.68 KB
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Dmitry PolushkinOverheat, it could be done using:
a.map(&:downcase).uniq -
Artūras ŠlajusBut doing so destroys original values.
For example my patch is very useful for tagging support where we want to keep original values.
>> a = ["Drum and bass", "drum'and'bass"] => ["Drum and bass", "drum'and'bass"] >> a.map { |i| i.parameterize.to_s }.uniq => ["drum-and-bass"] >> a.uniq { |i| i.parameterize.to_s } => ["Drum and bass"] -
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Artūras Šlajus
And why does other stuff in activesupport belong in core? Not that I like being itchy but this patch doesn't hurt and perhaps it will be useful for someone?
What's the motivation of dropping it out?