diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/enumerable.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/enumerable.rb | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb index c448d0454d..1b96eb166a 100644 --- a/activesupport/lib/active_support/core_ext/enumerable.rb +++ b/activesupport/lib/active_support/core_ext/enumerable.rb @@ -2,7 +2,7 @@ module Enumerable # Collect an enumerable into sets, grouped by the result of a block. Useful, # for example, for grouping records by date. # - # e.g. + # Example: # # latest_transcripts.group_by(&:day).each do |day, transcripts| # p "#{day} -> #{transcripts.map(&:class) * ', '}" @@ -23,18 +23,21 @@ module Enumerable # Calculates a sum from the elements. Examples: # - # payments.sum { |p| p.price * p.tax_rate } - # payments.sum(&:price) + # payments.sum { |p| p.price * p.tax_rate } + # payments.sum(&:price) # - # This is instead of payments.inject { |sum, p| sum + p.price } + # This is instead of + # + # payments.inject { |sum, p| sum + p.price } # # Also calculates sums without the use of a block: + # # [5, 15, 10].sum # => 30 # # The default identity (sum of an empty list) is zero. # However, you can override this default: # - # [].sum(Payment.new(0)) { |i| i.amount } # => Payment.new(0) + # [].sum(Payment.new(0)) { |i| i.amount } # => Payment.new(0) # def sum(identity = 0, &block) return identity unless size > 0 |