First-class support for constant values and immutable collections (great for parallel and functional programming) Functions can be top-level elements (i.e., there is no need to put everything inside a class) Functions are first-class citizens: they can be passed around just like any other typ...
publicopenclassAny{/** * Indicates whether some other object is "equal to" this one. Implementations must fulfil the following * requirements: * * * Reflexive: for any non-null reference value x, x.equals(x) should return true. * * Symmetric: for any non-null reference values x and y...
我们使用enumValues()函数来列出枚举的所有值:@SinceKotlin("1.1") public inline fun <reified T : Enum<T>> enumValues(): Array<T>每个枚举常量,默认都name名称和ordinal位置的属性(这个跟Java的Enum类里面的类似):val name: String val ordinal: Int代码示例:...
* * Transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true * * Consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true ...
* * Transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true * * Consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true ...
values()) { vm.clear(); } mMap.clear(); } } ViewModelStore是一个容器,用于盛放ViewModel。在ViewModelStore的clear方法中调用了该ViewModelStore中所有ViewModel的clear方法。那么ViewModelStore的clear是在哪里调用的?我跟着追踪,发现是在ComponentActivity的构造方法中。 public ComponentActivity() { Lifecycle ...
= null) : Comparable<Student> { override fun compareTo(other: Student): Int { return compareValuesBy(this, other, { it.name }, { it.age }) } }Copy As we can see, we will compare two Student objects by the name first and then age. Let’s verify it with Iterable.sort(). First...
newValue : previous;if(mCleared) {// It is possible that we'll call close() multiple times on the same object, but// Closeable interface requires close method to be idempotent:// "if the stream is already closed then invoking this method has no effect." (c)closeWithRuntimeException(res...
newValue : previous; if (mCleared) { // It is possible that we'll call close() multiple times on the same object, but // Closeable interface requires close method to be idempotent: // "if the stream is already closed then invoking this method has no effect." (c) closeWithRuntime...
Destructuring Declarations is a smart way to assign multiple values to variables from data stored in objects/arrays. [](https://jour...