Kotlin (programming language): Difference between revisions

Revision as of 15:22, 3 July 2014

Revision as of 07:00, 10 July 2014

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Kotlin makes a difference between nullable and non-null datatypes. All nullable objects must be declared with a "?" postfix after the type name. Operations on nullable objects needs special care from developers: null-check must be performed before using the value. Kotlin provides null-safe operators to help developers:

* ?. can be used to safely access a method or property of a possibly null object. If the object is null, the method will not be called and the expression evaluates to null.

* ?: also known as [[Elvis operator]]

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