Created
March 25, 2014 20:13
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| class Foo | |
| def self.bar | |
| return @bar if defined?(@bar) | |
| puts "Calculating" | |
| @bar = "bar" | |
| end | |
| end | |
| irb(main):008:0> Foo.bar | |
| Calculating | |
| => "bar" | |
| irb(main):009:0> Foo.bar | |
| => "bar" |
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