Created
June 8, 2011 16:01
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ruby catch/throw
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| def next | |
| loop do | |
| if cache.empty? | |
| cache.concat(next_block) | |
| if cache.empty? | |
| nil | |
| else | |
| redo | |
| end | |
| else | |
| cache.shift | |
| end | |
| break | |
| end | |
| end | |
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