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speed up index_by by removing a lolinject

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This commit is contained in:
Aaron Patterson 2010-10-01 17:37:34 -07:00
parent ff2fdcc52b
commit 61e8b23fe5
1 changed files with 1 additions and 4 deletions
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5
activesupport/lib/active_support/core_ext/enumerable.rb
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@ -90,10 +90,7 @@ module Enumerable
# => { "Chade- Fowlersburg-e" => <Person ...>, "David Heinemeier Hansson" => <Person ...>, ...}
#
def index_by
inject({}) do |accum, elem|
accum[yield(elem)] = elem
accum
end
Hash[map { |elem| [yield(elem), elem] }]
end
# Returns true if the collection has more than 1 element. Functionally equivalent to collection.size > 1.