It’s not exactly a “simple” question, so don’t beat yourself up. The issue is that with a single /e, the RHS is understood to be code whose eval’d result is used for the replacement. What is that RHS? It’s $1. If you evaluated $1, you find that contains the string $var. It does not contain … Read more
The Javadoc of int java.lang.Class.getModifiers() specifies what should be returned for some of the modifiers for array types (for example, the final modifier is required to be true and the interface modifier is required to be false). On the other hand, it doesn’t specify what the abstract or static modifiers should be for array types, … Read more
The short answer is – it’s a slightly wider form of private. I’ll assume that you’re familiar with the distinction between public and private, and why it’s generally good practice to make methods and variables private if they’re going to be used solely internally to the class in question. Well, as an extension to that … Read more
Consider reading section 10.6.7 of the C# specification, which answers many of your questions. I reproduce part of it here for your convenience: When a method declaration includes an extern modifier, that method is said to be an external method. External methods are implemented externally, typically using a language other than C#. Because an external … Read more
You can do all kinds of fun stuff with javascript, including redefining functions: let a = function() { return 1; } console.log(a()); // 1 // keep a reference let old = a; // redefine a = function() { // call the original function with any arguments specified, storing the result const originalResult = old.apply(old, arguments); … Read more
In this example, there’s one subtle difference – in your first example, foo isn’t determined to be a compile-time constant, so it can’t be used as a case in switch blocks (and wouldn’t be inlined into other code); in your second example it, is. So for example: switch (args[0]) { case foo: System.out.println(“Yes”); break; } … Read more
The volatile and transient modifiers can be applied to fields of classes1 irrespective of field type. Apart from that, they are unrelated. The transient modifier tells the Java object serialization subsystem to exclude the field when serializing an instance of the class. When the object is then deserialized, the field will be initialized to the … Read more
Screen’s Background Color (As of Xcode Version 13) I’m not sure if the original poster meant the background color of the entire screen or of individual views. So I’ll just add this answer which is to set the entire screen’s background color. Using ZStack var body: some View { ZStack { Color.purple .ignoresSafeArea() // Your … Read more
open is a new access level in Swift 3, introduced with the implementation of SE-0117 Allow distinguishing between public access and public overridability It is available with the Swift 3 snapshot from August 7, 2016, and with Xcode 8 beta 6. In short: An open class is accessible and subclassable outside of the defining module. … Read more