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