回答編集履歴
3
sort_by→max_by
answer
CHANGED
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@@ -1,13 +1,13 @@
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1
1
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```ruby
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2
2
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ary = %w[blue red red green blue red]
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3
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-
puts ary.group_by(&:itself).
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3
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+
puts ary.group_by(&:itself).max_by{|_, v| v.size}[0]
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4
4
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```
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5
5
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6
6
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なお、今月出るはずのRuby2.7では
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7
7
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8
8
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```ruby
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9
9
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ary = %w[blue red red green blue red]
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10
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-
puts ary.tally.
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10
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+
puts ary.tally.max_by(&:last)[0]
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11
11
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```
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12
12
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13
13
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で取れる予定です。
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2
修正
answer
CHANGED
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@@ -1,6 +1,6 @@
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1
1
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```ruby
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2
2
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ary = %w[blue red red green blue red]
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3
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-
puts
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3
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+
puts ary.group_by(&:itself).sort_by{|_, v| v.size}[-1][0]
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4
4
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```
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5
5
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6
6
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なお、今月出るはずのRuby2.7では
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1
修正
answer
CHANGED
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@@ -1,6 +1,6 @@
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1
1
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```ruby
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2
2
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ary = %w[blue red red green blue red]
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3
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-
puts p ary.group_by(&:itself).sort_by{|_, v| v.size}
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3
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+
puts p ary.group_by(&:itself).sort_by{|_, v| v.size}[-1][0]
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4
4
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```
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5
5
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6
6
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なお、今月出るはずのRuby2.7では
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