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-rw-r--r--activesupport/lib/active_support/core_ext/enumerable.rb5
1 files changed, 1 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb
index f1103029c8..6ecedc26ef 100644
--- a/activesupport/lib/active_support/core_ext/enumerable.rb
+++ b/activesupport/lib/active_support/core_ext/enumerable.rb
@@ -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.