blob: a49c4c701b44d0f46cacec7affa5dd94a4742ea9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
module Enumerable #:nodoc:
def first_match
match = nil
each do |items|
break if match = yield(items)
end
match
end
# Collect an enumerable into sets, grouped by the result of a block. Useful,
# for example, for grouping records by date.
#
# e.g.
#
# latest_transcripts.group_by(&:day).each do |day, transcripts|
# p "#{day} -> #{transcripts.map(&:class) * ', '}"
# end
# "2006-03-01 -> Transcript"
# "2006-02-28 -> Transcript"
# "2006-02-27 -> Transcript, Transcript"
# "2006-02-26 -> Transcript, Transcript"
# "2006-02-25 -> Transcript"
# "2006-02-24 -> Transcript, Transcript"
# "2006-02-23 -> Transcript"
def group_by
inject({}) do |groups, element|
(groups[yield(element)] ||= []) << element
groups
end
end
end
|
