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December 12, 2015 12:39
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Extension for Ruby's Hash class: - `Hash#replace_key!` - `Hash#replace_key`
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| class Hash | |
| def replace_key!(a, b) | |
| if self[a] | |
| self[b] = self.delete(a) | |
| end | |
| self | |
| end | |
| def replace_key(a, b) | |
| if self[a] | |
| self.dup.replace_key!(a, b) | |
| else | |
| self | |
| end | |
| end | |
| end |
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