Lambda Expression

[chauthanhdat]

Hi, thanks for your project.
I have a little question about the lamdba expression. At the beginning of some class I found you using "=>" to assign value to variable instead of "=". Example:

[SerializeField] private AppContext _appContext;
[SerializeField] private InteractableDropdown _iconsSetDropdown;
[SerializeField] private InteractableDropdown _fillStrategyDropdown;
[SerializeField] private InteractableButton _startGameButton;

public int SelectedIconsSetIndex => _iconsSetDropdown.SelectedIndex;
public int SelectedFillStrategyIndex => _fillStrategyDropdown.SelectedIndex;

Can you explain why you use "=>" instead of "="?
Thank you.

[ChebanovDD]

Hi there! These are different things.

The = is an assignment operator.
The => is an expression-bodied member.

Expression-bodied read-only property (syntactic sugar):

public int SelectedFillStrategyIndex => _fillStrategyDropdown.SelectedIndex;

How the compiler sees it:

public int SelectedFillStrategyIndex
{
    get { return _fillStrategyDropdown.SelectedIndex; }
}

Expression body definition is just a way to implement a read-only property in a very concise, readable form.