Kotlin：检查 Null 并分配？

Question

var something: Something? = null
val notNull: Something = ...

...

fun getSomething() {
    something = something ?: notNull
    return something
}

Kotlin 中是否有任何方法可以同时something = something?: notNull; return something 同时something = something?: notNull; return something ？

或者.. 更好的是，有没有办法在内联 function 中使用 generics？

Answer 1

fun getSomething(): Something {
    return something ?: notNull.also { something = it }
}
// or 
fun getSomething(): Something = something ?: notNull.also { something = it }