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A comment on Kotlin becomes second most popular language on the JVM. Parent comment

Re:Kotlin becomes second most popular language on the JVM by dajohnson89 on Thursday February 06, 2020 @01:38PM (#22258821)
isn’t optional just replacing the null check with if(optionalRef.isPresent)??

i kinda get how this is safer, but clients can just call optionalRef.get() without checking, and boom there goes the safety. compiler warnings be damned.

[ Parent | on HN ]
Re:Kotlin becomes second most popular language on the JVM by vips7L on Thursday February 06, 2020 @01:43PM (#22258891)
Optional is just signaling to the user that they should check.

You could also do this in Kotlin and boom there goes the safety:

  fn nonNull(): String {
    val s: String? = null
    return !!s
  }
[ Parent | on HN ]