isupeene/sparse-matrix — pull request #17 by isupeene (2014-10-01 01:36:12+00:00)
Title: Added the matrix builder contracts...

along with simple test cases to exercise each of the contracts. Additionally, added a simple implementation of MatrixBuilder for constructing complete matrices.

Also added the file `matrix.rb` for adding the matrix contract to the built-in Matrix class.
@bsoetaer