non-nullable

In Kotlin, what is the idiomatic way to deal with nullable values, referencing or converting them

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If I have a nullable type Xyz?, I want to reference it or convert it to a non-nullable type Xyz. What is the idiomatic way of doing so in Kotlin? For example, this code is in error: val something: Xyz? = createPossiblyNullXyz() something.foo() // Error: “Only safe (?.) or non-null asserted (!!.) calls are allowed … Read more

Best explanation for languages without null

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Every so often when programmers are complaining about null errors/exceptions someone asks what we do without null. I have some basic idea of the coolness of option types, but I don’t have the knowledge or languages skill to best express it. What is a great explanation of the following written in a way approachable to … Read more