Methods
Public Instance methods
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"]
[ show source ]
# File vendor/rails/activesupport/lib/active_support/core_ext/array/grouping.rb, line 23 23: def in_groups_of(number, fill_with = nil, &block) 24: require 'enumerator' 25: collection = dup 26: collection << fill_with until collection.size.modulo(number).zero? unless fill_with == false 27: grouped_collection = [] unless block_given? 28: collection.each_slice(number) do |group| 29: block_given? ? yield(group) : grouped_collection << group 30: end 31: grouped_collection unless block_given? 32: end
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]]
[ show source ]
# File vendor/rails/activesupport/lib/active_support/core_ext/array/grouping.rb, line 41 41: def split(value = nil, &block) 42: block ||= Proc.new { |e| e == value } 43: inject([[]]) do |results, element| 44: if block.call(element) 45: results << [] 46: else 47: results.last << element 48: end 49: results 50: end 51: end