method

in_groups

v6.1.7.7 - Show latest stable - 0 notes - Class: Array

in_groups(number, fill_with = nil) public

Splits or iterates over the array in number of groups, padding any remaining slots with fill_with unless it is false.

%w(1 2 3 4 5 6 7 8 9 10).in_groups(3) {|group| p group} ["1", "2", "3", "4"] ["5", "6", "7", nil] ["8", "9", "10", nil] %w(1 2 3 4 5 6 7 8 9 10).in_groups(3, '&nbsp;') {|group| p group} ["1", "2", "3", "4"] ["5", "6", "7", "&nbsp;"] ["8", "9", "10", "&nbsp;"] %w(1 2 3 4 5 6 7).in_groups(3, false) {|group| p group} ["1", "2", "3"] ["4", "5"] ["6", "7"]

Show source

# File activesupport/lib/active_support/core_ext/array/grouping.rb, line 62 def in_groups(number, fill_with = nil) # size.div number gives minor group size; # size % number gives how many objects need extra accommodation; # each group hold either division or division + 1 items. division = size.div number modulo = size % number # create a new array avoiding dup groups = [] start = 0 number.times do |index| length = division + (modulo > 0 && modulo > index ? 1 : 0) groups << last_group = slice(start, length) last_group << fill_with if fill_with != false && modulo > 0 && length == division start += length end if block_given? groups.each { |g| yield(g) } else groups end end

in_groups

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