ismasan/hash_mapper — pull request #12 by iainbeeston (2014-07-02 12:21:37+00:00)
Title: Default values

Implementation for #10

How?
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`map()` now accepts an options hash as it's last parameter. To keep backwards compatibility, `using()` returns an options hash. Instead of ignoring a value if it's not in the input, a default value is used if one is specified.