Created
August 7, 2015 02:15
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Crystal: Open class for nil
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| class Object | |
| def hello | |
| puts "hello" | |
| end | |
| def to (&block) | |
| yield self if self | |
| end | |
| end | |
| a = nil | |
| a.hello | |
| puts (a.to &.to_i) | |
| puts ("100".to &.to_i) | |
| puts %(env["MODE"]), ENV["MODE"]?.to &.to_i || 1000 | |
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