import "github.com/zyedidia/generic/array2d"Package array2d contains an implementation of a 2D array.
- type Array2D
- func New[T any](width, height int) Array2D[T]
- func NewFilled[T any](width, height int, value T) Array2D[T]
- func OfJagged[J ~[]S, S ~[]E, E any](width, height int, jagged J) Array2D[E]
- func (a Array2D[T]) Copy() Array2D[T]
- func (a Array2D[T]) Fill(x1, y1, x2, y2 int, value T)
- func (a Array2D[T]) Get(x, y int) T
- func (a Array2D[T]) Height() int
- func (a Array2D[T]) Row(y int) []T
- func (a Array2D[T]) RowSpan(x1, x2, y int) []T
- func (a Array2D[T]) Set(x, y int, value T)
- func (a Array2D[T]) String() string
- func (a Array2D[T]) Width() int
type Array2D
Array2D is a 2-dimensional array.
type Array2D[T any] struct {
// contains filtered or unexported fields
}Example
package main
import (
"fmt"
"strings"
"github.com/zyedidia/generic/array2d"
)
type Sudoku struct {
arr array2d.Array2D[byte]
}
func (s Sudoku) PrintBoard() {
var sb strings.Builder
for y := 0; y < s.arr.Height(); y++ {
if y%3 == 0 {
sb.WriteString("+-------+-------+-------+\n")
}
for x := 0; x < s.arr.Width(); x++ {
if x%3 == 0 {
sb.WriteString("| ")
}
val := s.arr.Get(x, y)
if val == 0 {
sb.WriteByte(' ')
} else {
fmt.Fprint(&sb, val)
}
sb.WriteByte(' ')
}
sb.WriteString("|\n")
}
sb.WriteString("+-------+-------+-------+\n")
fmt.Print(sb.String())
}
func main() {
s := Sudoku{
arr: array2d.OfJagged(9, 9, [][]byte{
{5, 3, 0, 0, 7, 0, 0, 0, 0},
{6, 0, 0, 1, 9, 5, 0, 0, 0},
{0, 9, 8, 0, 0, 0, 0, 6, 0},
{8, 0, 0, 0, 6, 0, 0, 0, 3},
{4, 0, 0, 8, 0, 3, 0, 0, 1},
{7, 0, 0, 0, 2, 0, 0, 0, 6},
{0, 6, 0, 0, 0, 0, 2, 8, 0},
{0, 0, 0, 4, 1, 9, 0, 0, 5},
{0, 0, 0, 0, 8, 0, 0, 7, 9},
}),
}
s.arr.Set(2, 5, 3)
s.PrintBoard()
}+-------+-------+-------+
| 5 3 | 7 | |
| 6 | 1 9 5 | |
| 9 8 | | 6 |
+-------+-------+-------+
| 8 | 6 | 3 |
| 4 | 8 3 | 1 |
| 7 3 | 2 | 6 |
+-------+-------+-------+
| 6 | | 2 8 |
| | 4 1 9 | 5 |
| | 8 | 7 9 |
+-------+-------+-------+
func New
func New[T any](width, height int) Array2D[T]New initializes a 2-dimensional array with all zero values.
func NewFilled
func NewFilled[T any](width, height int, value T) Array2D[T]NewFilled initializes a 2-dimensional array with a value.
func OfJagged
func OfJagged[J ~[]S, S ~[]E, E any](width, height int, jagged J) Array2D[E]OfJagged initializes a 2-dimensional array based on a jagged slice of rows of values. Values from the jagged slice that are out of bounds are ignored.
func (Array2D[T]) Copy
func (a Array2D[T]) Copy() Array2D[T]Copy returns a shallow copy of this array.
func (Array2D[T]) Fill
func (a Array2D[T]) Fill(x1, y1, x2, y2 int, value T)Fill will assign all values inside the region to the specified value. The coordinates are inclusive, meaning all values from [x1,y1] including [x1,y1] to [x2,y2] including [x2,y2] are set.
The method sorts the arguments, so x2 may be lower than x1 and y2 may be lower than y1.
func (Array2D[T]) Get
func (a Array2D[T]) Get(x, y int) TGet returns a value from the array.
The function will panic on out-of-bounds access.
func (Array2D[T]) Height
func (a Array2D[T]) Height() intHeight returns the height of this array. The maximum y value is Height()-1.
func (Array2D[T]) Row
func (a Array2D[T]) Row(y int) []TRow returns a mutable slice for an entire row. Changing values in this slice will affect the array.
func (Array2D[T]) RowSpan
func (a Array2D[T]) RowSpan(x1, x2, y int) []TRowSpan returns a mutable slice for part of a row. Changing values in this slice will affect the array.
func (Array2D[T]) Set
func (a Array2D[T]) Set(x, y int, value T)Set sets a value in the array.
The function will panic on out-of-bounds access.
func (Array2D[T]) String
func (a Array2D[T]) String() stringString returns a string representation of this array.
func (Array2D[T]) Width
func (a Array2D[T]) Width() intWidth returns the width of this array. The maximum x value is Width()-1.
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