* * Never equal to null: for any non-null value `x`, `x.equals(null)` should return false. A module in kotlin is a set of Kotlin files compiled together. internal means that the declarations are visible inside a module. * * Consistent: for any non-null values `x` and `y`, multiple invocations of `x.equals(y)` consistently return true or consistently return false, provided no information used in `equals` comparisons on the objects is modified. internal is an alternative to Java’s package-private. * * Transitive: for any non-null values `x`, `y`, and `z`, if `x.equals(y)` returns true and `y.equals(z)` returns true, then `x.equals(z)` should return true. It may be the maven, Gradle sets and Ant tasks which is having the files generated or any other IntelliJ IDEA module. It contains a set of kotlin files and it is compiled together with the modules. * * Symmetric: for any non-null values `x` and `y`, `x.equals(y)` should return true if and only if `y.equals(x)` returns true. Kotlin internal is one of the access modifiers and it is used to declare the datas and it is visible only inside a module. Implementations must fulfil the following * requirements: * * * Reflexive: for any non-null value `x`, `x.equals(x)` should return true. ** * Indicates whether some other object is "equal to" this one. It has Lambdas, Coroutines, Properties and many other featires that allow us to write less code. All three functions are well-known functions which can be overridden in any class. Kotlin is an expressive programming language with a strong type system featuring type inference.
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