Variable None

None: None

A constant representing the None case of an Option, indicating the absence of a value. This constant is frozen to ensure it is immutable and cannot be altered, preserving the integrity of None throughout the application.

Since

1.0.0

Example

// Use None to represent absence of a value
function findUser(id: number): Option<User> {
    const user = users.find(u => u.id === id);
    return user ? Some(user) : None;
}

// None is a singleton, so you can compare by reference
const result = findUser(999);
if (result === None) {
    console.log('User not found');
}

// Use with Option methods
const name = None.unwrapOr('Anonymous'); // 'Anonymous'

Variable None

Since

Example

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