![]() Negative values show that it's less than the argument.Ä«elow is a class for ordering versions that consist of the major and the minor part. Positive values show that the receiver object is greater. compareTo() must take another object of the same type as an argument and return an integer value showing which object is greater: This requires implementing the compareTo() function. ![]() To define a natural order for a user-defined type, make the type an implementer of Comparable. Numeric types use the traditional numerical order: 1 is greater than 0 -3.4f is greater than -5f, and so on.Ĭhar and String use the lexicographical order: b is greater than a world is greater than hello. We can create an ArrayList implementation of the mutable list simply by using a constructor: val arrayList ArrayList () arrayList.add ( 'Kotlin' ) arrayList.add ( 'Java') This is Kotlinâs implementation of dynamic arrays.Natural order is used for sorting them when no other order is specified. It is defined for implementations of the Comparable interface. In Kotlin, the orders of objects can be defined in several ways.įirst, there is natural order. For example, two lists of the same elements are not equal if their elements are ordered differently. The order of elements is an important aspect of certain collection types.
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