Generic structs in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a generic struct named Point with one type parameter T.

Rust

struct Point<[1]> {
    x: T,
    y: T,
}

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AT

BU

CV

DX

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to declare the generic type parameter after the struct name.

Using a different letter in the struct declaration and fields.

The generic type parameter is declared inside angle brackets after the struct name. Here, T is the type parameter used for the fields.

2fill in blank

medium

Complete the code to create an instance of Point with i32 type.

Rust

let p = Point::<[1]>{ x: 5, y: 10 };

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Af64

Bbool

CString

Di32

Attempts:

3 left

💡 Hint

Common Mistakes

Using a type that does not match the field values.

Omitting the type parameter when creating the instance.

To create a generic struct instance with a specific type, use the syntax Point::. Here, i32 is the integer type.

3fill in blank

hard

Fix the error in the struct definition to allow different types for x and y.

Rust

struct Point<[1], U> {
    x: T,
    y: U,
}

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AT

BU

CV

DX

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong generic parameter name for the first type.

Not declaring enough generic parameters for the fields.

To have different types for x and y, declare two generic parameters T and U. The first parameter must be T to match the field x.

4fill in blank

hard

Fill both blanks to define a generic struct Pair with two type parameters and fields of those types.

Rust

struct Pair<[1], [2]> {
    first: T,
    second: U,
}

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AT

BV

CU

DW

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of generic parameters.

Using generic parameters that don't match the field types.

The struct has two generic parameters T and U. The fields first and second use these types respectively.

5fill in blank

hard

Fill all three blanks to create a generic struct Triple with three type parameters and fields.

Rust

struct Triple<[1], [2], [3]> {
    a: X,
    b: Y,
    c: Z,
}

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

AX

BY

CZ

DT

Attempts:

3 left

💡 Hint

Common Mistakes

Using fewer generic parameters than fields.

Using generic parameters that don't match the field names.

The struct has three generic parameters X, Y, and Z. The fields a, b, and c use these types respectively.