Receiver types in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a method with a pointer receiver.

Go

func (p [1]) Greet() string {
    return "Hello, " + p.name
}

Drag options to blanks, or click blank then click option'

Aperson

BPerson

C*Person

D&Person

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value receiver when a pointer receiver is needed.

Forgetting the asterisk (*) in the receiver type.

The method receiver must be a pointer type *Person to modify the original struct.

2fill in blank

medium

Complete the code to call the method with a pointer receiver correctly.

Go

p := Person{name: "Alice"}
result := p.[1]()

Drag options to blanks, or click blank then click option'

AGreet()

B&Greet

C*Greet

DGreet

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call the method with & or * symbols.

Adding parentheses in the method name inside the call.

Go automatically handles calling pointer receiver methods on value variables, so just use p.Greet().

3fill in blank

hard

Fix the error in the method receiver declaration.

Go

func ([1] Person) UpdateName(newName string) {
    p.name = newName
}

Drag options to blanks, or click blank then click option'

Ap

B*p

CPerson

D*Person

Attempts:

3 left

💡 Hint

Common Mistakes

Using the type name instead of a variable name as receiver.

Using pointer syntax incorrectly in the receiver variable name.

The receiver variable name should be an identifier like p, not a type.

4fill in blank

hard

Fill both blanks to define a method with a pointer receiver and update the struct field.

Go

func ([1] [2]) UpdateAge(newAge int) {
    p.age = newAge
}

Drag options to blanks, or click blank then click option'

Ap

BPerson

C*Person

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value receiver when a pointer receiver is needed to modify fields.

Using the struct name as the receiver variable.

The receiver variable is p and the receiver type is a pointer *Person to modify the original struct.

5fill in blank

hard

Fill all three blanks to create a method with a value receiver that returns the person's name in uppercase.

Go

func ([1] [2]) NameUpper() string {
    return strings.[3](p.name)
}

Drag options to blanks, or click blank then click option'

Ap

BPerson

CToUpper

DToLower

Attempts:

3 left

💡 Hint

Common Mistakes

Using pointer receiver when value receiver is intended.

Using ToLower instead of ToUpper.

Incorrect receiver variable name.

The receiver variable is p, the receiver type is Person (value receiver), and the function to convert to uppercase is ToUpper from the strings package.