Heterogeneous enums in Typescript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a heterogeneous enum with a string and a number.

Typescript

enum Status {
  Active = [1],
  Inactive = 0
}

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

A"1"

B1

Ctrue

D"ACTIVE"

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning a number without quotes for a string member.

Using boolean values in enums.

The enum member 'Active' is assigned a string value "ACTIVE" to create a heterogeneous enum with both string and number values.

2fill in blank

medium

Complete the code to access the string value of the enum member.

Typescript

const currentStatus = Status.[1];

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

AInactive

B0

CActive

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using the numeric value instead of the member name.

Using lowercase member names.

Accessing 'Status.Active' returns the string value "ACTIVE" assigned in the enum.

3fill in blank

hard

Fix the error in the enum declaration to correctly mix string and number values.

Typescript

enum Response {
  Yes = [1],
  No = "NO"
}

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

Anull

B1

Ctrue

D"YES"

Attempts:

3 left

💡 Hint

Common Mistakes

Using boolean or null values in enums.

Missing quotes for string values.

Assigning the number 1 to 'Yes' allows the enum to be heterogeneous with string and number values.

4fill in blank

hard

Fill both blanks to create a heterogeneous enum with a string and a number.

Typescript

enum Direction {
  Up = [1],
  Down = [2]
}

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

A"UP"

B0

C1

D"DOWN"

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning numbers as strings or vice versa.

Using the same type for both members.

The enum 'Direction' has 'Up' as a string "UP" and 'Down' as a number 1, making it heterogeneous.

5fill in blank

hard

Fill all three blanks to create a heterogeneous enum with string and number values and access a member.

Typescript

enum Mode {
  Read = [1],
  Write = [2],
}
const modeValue = Mode.[3];

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

A"READ"

B2

CWrite

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up member names and values when accessing.

Using numbers as strings or vice versa.

The enum 'Mode' has 'Read' as string "READ" and 'Write' as number 1. Accessing 'Mode.Write' returns 1.