completed stage 1 of about_hashes.rb

* pivotal tracker id [#75411410}
* learned how to create a new hash
* an empty has has a class of Hash, a size of zero, and is equal to {}
completed stage 2 of about_hashes

* pivotal tracker id [#75411410]
* learned that a hash's size is how many key: value pairs it has
completed stage 3 of about_hashes

* pivotal tracker id #[75411410]
* leanred how to access a value of a has by using hash[:key]
completed stage 4 and 5 of about_hashes

* pivotal tracker id #[75411410]
* learned how to use fetch to access has values
* learned how to change or set the values in a hash
completed stage 6 and 7 of about_hashes

* pivotal tracker id [#75411410]
* learned that hashes are not ordered
* learned how to test hash keys using hash.keys
completed stage 8 and 9 of about_hashes

* pivotal tracker id [#75411410]
* learned how to test hash values with hash.values
* learned how to merge hashes with hash.merge (super cool!)
completed stage 10, 11 and 12 of about_hashes

* pivotal tracker id [#75411410]
* learned about creating hashes with default values
Merge pull request #6 from glassbead0/75411410_about_hashes_master

about hashes master

[Delivers #75411410]