Module: ActiveSupport::CoreExtensions::Array::Grouping
- Included in:
- Array
- Defined in:
- lib/active_support/core_ext/array/grouping.rb
Instance Method Summary collapse
-
#in_groups_of(number, fill_with = nil, &block) ⇒ Object
Iterate over an array in groups of a certain size, padding any remaining slots with specified value (
nil
by default) unless it isfalse
. -
#split(value = nil, &block) ⇒ Object
Divide the array into one or more subarrays based on a delimiting
value
or the result of an optional block.
Instance Method Details
#in_groups_of(number, fill_with = nil, &block) ⇒ Object
Iterate over an array in groups of a certain size, padding any remaining slots with specified value (nil
by default) unless it is false
.
E.g.
%w(1 2 3 4 5 6 7).in_groups_of(3) {|g| p g}
["1", "2", "3"]
["4", "5", "6"]
["7", nil, nil]
%w(1 2 3).in_groups_of(2, ' ') {|g| p g}
["1", "2"]
["3", " "]
%w(1 2 3).in_groups_of(2, false) {|g| p g}
["1", "2"]
["3"]
23 24 25 26 27 28 29 30 31 32 |
# File 'lib/active_support/core_ext/array/grouping.rb', line 23 def in_groups_of(number, fill_with = nil, &block) require 'enumerator' collection = dup collection << fill_with until collection.size.modulo(number).zero? unless fill_with == false grouped_collection = [] unless block_given? collection.each_slice(number) do |group| block_given? ? yield(group) : grouped_collection << group end grouped_collection unless block_given? end |
#split(value = nil, &block) ⇒ Object
Divide the array into one or more subarrays based on a delimiting value
or the result of an optional block.
ex.
[1, 2, 3, 4, 5].split(3) # => [[1, 2], [4, 5]]
(1..10).to_a.split { |i| i % 3 == 0 } # => [[1, 2], [4, 5], [7, 8], [10]]
41 42 43 44 45 46 47 48 49 50 51 |
# File 'lib/active_support/core_ext/array/grouping.rb', line 41 def split(value = nil, &block) block ||= Proc.new { |e| e == value } inject([[]]) do |results, element| if block.call(element) results << [] else results.last << element end results end end |