matrix

README

Saddle Points

Detect saddle points in a matrix.

So say you have a matrix like so:

    0  1  2
  |---------
0 | 9  8  7
1 | 5  3  2     <--- saddle point at (1,0)
2 | 6  6  7

It has a saddle point at (1, 0).

It's called a "saddle point" because it is greater than or equal to every element in its row and the less than or equal to every element in its column.

A matrix may have zero or more saddle points.

Your code should be able to provide the (possibly empty) list of all the saddle points for any given matrix.

Note that you may find other definitions of matrix saddle points online, but the tests for this exercise follow the above unambiguous definition.

Running the tests

To run the tests run the command go test from within the exercise directory.

If the test suite contains benchmarks, you can run these with the -bench flag:

go test -bench .

Keep in mind that each reviewer will run benchmarks on a different machine, with different specs, so the results from these benchmark tests may vary.

Further information

For more detailed information about the Go track, including how to get help if you're having trouble, please visit the exercism.io Go language page.

Source

J Dalbey's Programming Practice problems http://users.csc.calpoly.edu/~jdalbey/103/Projects/ProgrammingPractice.html

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Documentation

Index

• type Matrix
  • func New(s string) (*Matrix, error)
  • func (m *Matrix) Cols() [][]int
  • func (m *Matrix) Rows() [][]int
  • func (m *Matrix) Saddle() (p []Pair)
  • func (m *Matrix) Set(row, col, val int) (ok bool)
• type Pair

Types

type Matrix

type Matrix [][]int

func New

func New(s string) (*Matrix, error)

func (*Matrix) Cols

func (m *Matrix) Cols() [][]int

func (*Matrix) Rows

func (m *Matrix) Rows() [][]int

func (*Matrix) Saddle

func (m *Matrix) Saddle() (p []Pair)

func (*Matrix) Set

func (m *Matrix) Set(row, col, val int) (ok bool)

type Pair

type Pair struct {
	// contains filtered or unexported fields
}