I'm reading the Kotlin `String` API and have a few questions... <https://kotlinlang.org/api/latest/j...

# getting-started

[Ellen Spertus]

I'm reading the Kotlin String API and have a few questions... https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/

[Ellen Spertus]

Why are there both functions and extension functions? Since Kotlin owns kotlin.String , why not build in any functions they want?

[Ellen Spertus]

Why is there both kotlin.String and kotlin.text.String? https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/-string.html

[Ellen Spertus]

The latter appears to just contain constructors.

[franztesca]

Answeing the first https://elizarov.medium.com/extension-oriented-design-13f4f27deaee

[Ellen Spertus]

(I see the article cites my favorite talk, Guy Steele's "Growing a Language".)

[gildor]

kotlin.String - is actual class
kotlin.text.String - builder function which emulates string constructor, but implemented as part of String utils as top level function, which is quite common pattern in Kotlin