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madness
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| irb(main):011:0> a = %w{aye bee cee} | |
| => ["aye", "bee", "cee"] | |
| irb(main):012:0> a.one? { false } | |
| => false | |
| irb(main):013:0> a.one? { true } | |
| => false | |
| irb(main):014:0> a.one? { |v| v == "aye" } | |
| => true | |
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| >> a = %w{aye bee cee} | |
| => ["aye", "bee", "cee"] | |
| >> a.one? { false } | |
| => false | |
| >> a.one? { true } | |
| => false | |
| >> a.one? { |v| v == "aye" } | |
| => false |
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