I have a small problem to solve. I need a data str...

# getting-started

[dan]

I have a small problem to solve. I need a data structure similar to map but it only allows to assign value the first time. I understood that I could create a customise Map class but I am looking for a shorter way from built int library. Ex:

m = mutableMapOf<String, Int>()
m.put("a", 1)
m.put("a", 1) // throw exception here

[dan]

Thanks @Ruckus. This saves my laziness.