Format in kotlin string templates

Question

Kotlin has an excellent feature called string templates. I really love it.

 val i = 10 
 val s = \"i = $i\" // evaluates to \"i = 10\"

But

Answer 1

Unfortunately, there's no built-in support for formatting in string templates yet, as a workaround, you can use something like:

"pi = ${pi.format(2)}"

the .format(n) function you'd need to define yourself as

fun Double.format(digits: Int) = "%.${digits}f".format(this)

There's clearly a piece of functionality here that is missing from Kotlin at the moment, we'll fix it.