I made this extension function for operator "*" ``...

# random

[Ananiya]

I made this extension function for operator "*"

operator fun String.times(i: Int){
      var string: String? = null
       repeat(i){
            string = this
       }
       return string
}

fun main(){
       print("hello"*8)
}

It suppose to print 8x but it returns null from the fun or print only 1 hello

[Cicero]

how it is supposed to know the the symbol “*” should trigger this “times”?

[wasyl]

I think you need string += this and not string = this

[Rob Elliot]

operator fun String.times(i: Int): String {
    var string = ""
    repeat(i){
        string += this
    }
    return string
}

[Mikael Alfredsson]

@Cicero: https://kotlinlang.org/docs/reference/operator-overloading.html

[Ananiya]

Oh, thanks all for help I never thought t"+" would have that much effect

[Mikael Alfredsson]

operator fun String?.times(i: Int) = this?.repeat(i)

[Ananiya]

@Cicero there is operator in the function

[Cicero]

Danke 🙂

[Rob Elliot]

@Mikael Alfredsson I’d suggest not making the receiver type nullable; it means that "hello" * 1 has type String?, which I’d find more of a pain than occasionally having to do val x: String? = null; x?.times(1)

[Mikael Alfredsson]

@Rob Elliot You’re right. it was an optimization to far 🙂

[Mikael Alfredsson]

so the corrected version for @Ananiya

operator fun String.times(i: Int) = this.repeat(i)

and the compiler will tell you if you are trying to call it on a nullable string

[Ananiya]

Thanks @Mikael Alfredsson, I can do that with also if else to make that more secure

[Cicero]

This was a very cool short class

[louiscad]

Why not use the repeat extension for String?

[Ananiya]

Yeah , you are right but that would be realy easy for my project only one symbol

[louiscad]

Your project cannot afford to have repeat typed? blob thinking upside down

[louiscad]

I'm wondering what makes it so, not saying it's a bad idea to use the times operator since the behavior you're looking for is quite natural regarding its name and its symbol (*).

[Ananiya]

no 🤣 🤣, just to decrease lines. dont take that seriosly