Solution for Exercises on A Tour of Go

map.go

//Exercise: Maps
//Implement WordCount.
//It should return a map of the counts of each “word” in the string s. 
//The wc.Test function runs a test suite against the provided function and prints success or failure.

package main

import (
	"strings"

	"golang.org/x/tour/wc"
)

func WordCount(s string) map[string]int {
	stringSlice := make(map[string]int)
	words := strings.Fields(s)
	
	for _, v := range words {
		stringSlice[v]++
		
	}
	return stringSlice
}

func main() {
	wc.Test(WordCount)
}

slice.go

//Exercise: Slices
//Implement Pic. It should return a slice of length dy, each element of which is a slice of dx 8-bit unsigned integers. 
//When you run the program, it will display your picture, interpreting the integers as grayscale (well, bluescale) values.
//The choice of image is up to you. Interesting functions include (x+y)/2, x*y, and x^y.

package main

import (
	"golang.org/x/tour/pic"
)

func Pic(dx, dy int) [][]uint8 {
	//using make to create a slice of length dy
	pic := make([][]uint8, dy)
	for i := 0; i < dy; i++ {
		//using make to create a slice of length dx
		pic[i] = make([]uint8, dx)
	}
	//creating image
	for y, _ := range pic {
		for x, _ := range pic[y] {
			//choice for image
			
			//pic[y][x] = uint8(x ^ y)
			pic[y][x] = uint8(x+y)/2
			//pic[y][x] = uint8(x-y)
			//pic[y][x] = uint8((x <<uint8(y))/2)
		}
	}
	return pic
}

func main() {
	pic.Show(Pic)
}