John T. Prince jtprince
jtprince
/ nil_enumerator.rb
Created
June 8, 2012 18:47
NilEnumerator: an enumerator that returns nil instead of a StopIteration exception when it is at the end of the collection
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| # https://gist.github.com/gists/2897543 | |
| # NilEnumerator | |
| # | |
| # an enumerator that yields nil when it is finished. Only implements #next and | |
| # #peak. Would only want to use this if your collection does NOT already include | |
| # nils. | |
| # | |
| # Compare: | |
| # | |
| # # normal iteration requires catching StopIteration |