Do Nothing

[Kam]

I always see people saying no to use it, why?

 

[YourNameHere]

Because it does something; one function call.

function DoNothing takes nothing returns nothing
endfunction

Simply having do nothing in your code converts to this:

call DoNothing()

Which still takes a little processing time.

 

[The Reborn Devil]

The function DoNothing() does nothing else than decreasing the efficiency of your triggers.
Why Blizzard added is a mystery. Some people have found uses of it though, through vJASS they give it a purpose with the hook DoNothing <insert function name here>

 

[Yixx]

there is a use, it is called GUI.
In the ROC version of an IF in GUI, you could only set one then-action and one else-action. but you NEEDED to set one, leaving it empty wasnt possible. So they inserted DoNothing() to make sure you could do nothing in such an IF, probably..

 

[baassee]

last one is correct, used for ITE single

 

[mattman111]

Blizzard failed at that epicly do nothing function does do something XD

 

[Venks]

Why would you want to use a function that does nothing?

 

[Kam]

In some instances in GUI it's hard not too.

Spawn Hero
    Events
    Conditions
    Actions
        If (All Conditions are True) then do (Then Actions) else do (Else Actions)
            If - Conditions
                RandomHero Equal to 1
            Then - Actions
                If ((Player 1 (Red) slot status) Equal to Is playing) then do (Unit - Create 1 Magnate for Player 1 (Red) at (Player 1 (Red) start location) facing Default building facing degrees) else do (Do nothing)
                If ((Player 12 (Brown) slot status) Equal to Is playing) then do (Unit - Create 1 Wolf Rider for Player 12 (Brown) at (Player 12 (Brown) start location) facing Default building facing degrees) else do (Do nothing)
                If ((Player 10 (Light Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Shadow Hunter for Player 10 (Light Blue) at (Player 10 (Light Blue) start location) facing Default building facing degrees) else do (Do nothing)
                If ((Player 2 (Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Lord for Player 2 (Blue) at (Player 2 (Blue) start location) facing Default building facing degrees) else do (Do nothing)
                If ((Player 6 (Orange) slot status) Equal to Is playing) then do (Unit - Create 1 Blood Mage for Player 6 (Orange) at (Player 6 (Orange) start location) facing Default building facing degrees) else do (Do nothing)
                If ((Player 4 (Purple) slot status) Equal to Is playing) then do (Unit - Create 1 Bowmaster for Player 4 (Purple) at (Player 4 (Purple) start location) facing Default building facing degrees) else do (Do nothing)
            Else - Actions
                If (All Conditions are True) then do (Then Actions) else do (Else Actions)
                    If - Conditions
                        RandomHero Equal to 2
                    Then - Actions
                        If ((Player 1 (Red) slot status) Equal to Is playing) then do (Unit - Create 1 Shadow Hunter for Player 1 (Red) at (Player 1 (Red) start location) facing Default building facing degrees) else do (Do nothing)
                        If ((Player 12 (Brown) slot status) Equal to Is playing) then do (Unit - Create 1 Magnate for Player 12 (Brown) at (Player 12 (Brown) start location) facing Default building facing degrees) else do (Do nothing)
                        If ((Player 10 (Light Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Wolf Rider for Player 10 (Light Blue) at (Player 10 (Light Blue) start location) facing Default building facing degrees) else do (Do nothing)
                        If ((Player 2 (Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Bowmaster for Player 2 (Blue) at (Player 2 (Blue) start location) facing Default building facing degrees) else do (Do nothing)
                        If ((Player 6 (Orange) slot status) Equal to Is playing) then do (Unit - Create 1 Lord for Player 6 (Orange) at (Player 6 (Orange) start location) facing Default building facing degrees) else do (Do nothing)
                        If ((Player 4 (Purple) slot status) Equal to Is playing) then do (Unit - Create 1 Blood Mage for Player 4 (Purple) at (Player 4 (Purple) start location) facing Default building facing degrees) else do (Do nothing)
                    Else - Actions
                        If (All Conditions are True) then do (Then Actions) else do (Else Actions)
                            If - Conditions
                                RandomHero Equal to 3
                            Then - Actions
                                If ((Player 1 (Red) slot status) Equal to Is playing) then do (Unit - Create 1 Wolf Rider for Player 1 (Red) at (Player 1 (Red) start location) facing Default building facing degrees) else do (Do nothing)
                                If ((Player 12 (Brown) slot status) Equal to Is playing) then do (Unit - Create 1 Shadow Hunter for Player 12 (Brown) at (Player 12 (Brown) start location) facing Default building facing degrees) else do (Do nothing)
                                If ((Player 10 (Light Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Magnate for Player 10 (Light Blue) at (Player 10 (Light Blue) start location) facing Default building facing degrees) else do (Do nothing)
                                If ((Player 2 (Blue) slot status) Equal to Is playing) then do (Unit - Create 1 Blood Mage for Player 2 (Blue) at (Player 2 (Blue) start location) facing Default building facing degrees) else do (Do nothing)
                                If ((Player 6 (Orange) slot status) Equal to Is playing) then do (Unit - Create 1 Bowmaster for Player 6 (Orange) at (Player 6 (Orange) start location) facing Default building facing degrees) else do (Do nothing)
                                If ((Player 4 (Purple) slot status) Equal to Is playing) then do (Unit - Create 1 Lord for Player 4 (Purple) at (Player 4 (Purple) start location) facing Default building facing degrees) else do (Do nothing)
                            Else - Actions
        Trigger - Turn off (This trigger)

 

[The Reborn Devil]

Well, they shouldn't have made it call a function. They could have just replaced "DoNothing()" with ""