How to solve these coding exercises:


Coding Exercise #1

1. Declare a map called m1 which value is nil. Print out its type and value.

2. Declare a map called m2. It's keys are of type int and values of type string.  Initialize the map using  a map literal with two key:value pairs.

3. Add the following key: value to the map: 10: "Abba"

4. Retrieve the value of an existing key and the value of a non existing key. Think about the results.

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Coding Exercise #2

There are some errors in the following Go program. Try to identify the errors, change the code and run the program without errors.

package main

import "fmt"

func main() {
	var m1 map[int]bool
	m1[5] = true

	m2 := map[int]int{3: 10, 4: 40}
	m3 := map[int]int{3: 10, 4: 40}

	fmt.Println(m2 == m3)
}

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Coding Exercise #3

Consider the following map declaration: m := map[int]bool{"1": true, 2: false, 3: false}

1. The above map declaration has an error. Solve the error!

2. Delete a key:value pair from the map.

3. Iterate over the map and print out each key and value.

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