Translate a dot pattern to the correct Unicode braille codepoint

braille.go

package main

import "fmt"

type BrailleDots [4][2]bool

func (b BrailleDots) String() string {
	var braille uint32 = 0x2800
	set := [4][2]uint32{
		{0x01, 0x08},
		{0x02, 0x10},
		{0x04, 0x20},
		{0x40, 0x80},
	}

	for y := 0; y < 4; y++ {
		for x := 0; x < 2; x++ {
			if b[y][x] {
				braille |= set[y][x]
			}
		}
	}

	return string(rune(braille))
}

func main() {
	d := &BrailleDots{
		{true, false},
		{true, false},
		{true, false},
		{true, false},
	}
	fmt.Println(d)
}