← Sui Move theorytheory 0/25 · 0%

level 1

Curious · 0 XP

streak

perfect

badges

100 XP to Apprentice

Move 2024 · medium

7. Move 2024: Method Syntax (use fun)

Modern object-oriented calling syntax.

1 min read2 questionsup to 50 XPtopic 7/25

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

In Move 2024 edition, functions can be invoked directly on variables using dot-notation method syntax (`coin.value()` instead of `coin::value(&coin)`).

move
module my_package::counter {
    public struct Counter has key { id: UID, value: u64 }

    public fun increment(self: &mut Counter) {
        self.value = self.value + 1;
    }
}

// In Move 2024:
counter.increment();

How to study this topic

1. Read the explanation once end to end, skipping the code.
2. Re-read the code snippets and say out loud what each line does.
3. Answer the quiz without scrolling back — that is the real check.
4. Read every explanation, even for the answers you got right.

Scoring

· Up to 30 XP from quiz accuracy.
· +15 XP for a perfect first attempt.
· +5 XP while a 3-day streak is running.
· 75% or higher marks the topic complete.

Check your understanding

1. What does Method Syntax in Move 2024 allow developers to write?
obj.method() dot-notation instead of module::method(&mut obj)Classes in MovePython decoratorsInheritance trees
2. How do you associate an external function with a type for method syntax?
use fun path::to::func as Type.methodimpl Type { ... }class Type:@method

Badges

First light

Pass your first topic

Sharp shooter

3 perfect first-try quizzes

On a roll

Study 3 days in a row

Week warrior

Study 7 days in a row

Grinder

Earn 500 XP

Deep diver

Earn 1500 XP