matrix.go

package matrix

import (
	"fmt"
)

var DEBUG bool = false

type Matrix []float64
type Row []float64
type Builder []Row

/*
 * Provide `true` if you want errors to panic
 */
func SetDebug(debug bool) {
	DEBUG = debug
}

func generateError(message string) (err error) {
	if DEBUG {
		panic(message)
	} else {
		err = fmt.Errorf(message)
	}

	return
}

/*
 * A matrix is valid if it has rows, columns and if all its rows have the same
 * amount of columns.
 */
func (matrix Matrix) Valid() bool {
	return len(matrix) > 2 && len(matrix) == int(matrix[0])*int(matrix[1])+2
}

/*
 * Tells if two matrices have the same dimensions and same
 * values in each cell.
 */
func (matrix Matrix) EqualTo(otherMatrix Matrix) bool {
	if len(matrix) != len(otherMatrix) {
		return false
	}

	for i := 0; i < len(matrix); i++ {
		if matrix[i] != otherMatrix[i] {
			return false
		}
	}

	return true
}

/*
 * True if both matrices are valid and have the same dimensions
 */
func (matrix Matrix) SameDimensions(otherMatrix Matrix) bool {
	if !matrix.Valid() || !otherMatrix.Valid() {
		return false
	}

	return matrix[0] == otherMatrix[0] && matrix[1] == otherMatrix[1]
}