Yes, but i wondered is there is a way to create generic function for this instead of adding flags for every place like this

Maybe what you want is a lazy property?

val x: String by lazy {
    // executed only on first access
    expensiveFunction() 
}

No, that's not what i need

Then I don't see what you want... 😄

I does not solve the situation when i need 5 separate blocks to run once as i don't want to add 5 flags

Lazy solves exactly this problem though...

Ok here is the case: I have a code that runs every few ms repeatedly, i need to print some output when the specific not-rare case inside of this code is happened but i need only to print it once, since i don't want to flood log with text