Merge pull request #4 from glassbead0/75411406_about_arrays_master

about arrays master

[Delivers #75411406]
completed stage 1 of about_array_assignments.rb

* pivotal tracker id [#75411408]
* learned that you can assign elemts to an array like this:
* my_array = ['hello', 'world']
completed stage 2 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* learned that you can assign multiple variables using an array
* var1, var2 = [value1, value2]
completed stage 3 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* learned that extra values in an array are ignored when doing parallel
* assignment
completed stage 4 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* learned how to use the splat operate in parallal assignment
* var1, var2* = [value1, value2, value3] => var2 == [vale2, value3]
completed stage 5 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* if there are two few values in parallel assignment, the extra
* variables get assigned to nil
completed stage 6 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* used a subarray to assign a variable to an array, and another one to a
* string
completed stage 7 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* if only one variable is given, with a comma, it will be assigned to
* the first value in array
completed stage 8 of about_array_assingments.rb

* pivotal tracker id [#75411408]
* learned that you can swap values for variables with parallel
* assignment