No, in C you cannot omit identifiers for parameters in function definitions. The C99 standard says: [6.9.1.5] If the declarator includes a parameter type list, the declaration of each parameter shall include an identifier, except for the special case of a parameter list consisting of a single parameter of type void, in which case there … Read more
your command line is correct, but there are some considerations: you must have javac >= 1.6, because only in that version the compiler parses the “*” as various JAR files. you must be running Windows, because “;” is the path separator for that operating system only (it doesn’t work on Unix, the path separator on … Read more
You probably want to look deeper into dangerouslySetInnerHTML. Here is an example how to render HTML from a string in a React component: import React from ‘react’; import { render } from ‘react-dom’; const htmlString = ‘<h1>Hello World! 👋</h1>’; const App = () => ( <div dangerouslySetInnerHTML={{ __html: htmlString }} /> ); render(<App />, document.getElementById(‘root’)); … Read more
I’ve run the above code in Mac OS Java 7. None of them works. So i wrote one https://github.com/trung/InMemoryJavaCompiler StringBuilder source = new StringBuilder() .append(“package org.mdkt;\n”) .append(“public class HelloClass {\n”) .append(” public String hello() { return \”hello\”; }”) .append(“}”); Class<?> helloClass = InMemoryJavaCompiler.compile(“org.mdkt.HelloClass”, source.toString());
The header file declares functions/classes – i.e. tells the compiler when it is compiling a .cpp file what functions/classes are available. The .cpp file defines those functions – i.e. the compiler compiles the code and therefore produces the actual machine code to perform those actions that are declared in the corresponding .hpp file. In your … Read more
You’re absolutely correct, the empty macro doesn’t generate any code. I’ve seen two places where this is useful. The first is to eliminate warnings when a function parameter isn’t used: #define UNUSED(x) int foo(int UNUSED(value)) { return 42; } The second is when you use conditionals to determine if there should be code or not. … Read more
From the javac docs: -source Specifies the version of source code accepted. -target Generate class files that target a specified version of the VM. Class files will run on the specified target and on later versions, but not on earlier versions of the VM. In your example: -source 1.5 and -target 1.6 This would be … Read more
I found out that this might help: File -> Invalidate Caches
Consider the following function: unsigned sum_evens (unsigned number) { number &= ~1; // ~1 = 0xfffffffe (32-bit CPU) unsigned result = 0; while (number) { result += number; number -= 2; } return result; } Now, let’s play the compiler game and try to compile this by hand. I’m going to assume you’re using x86 … Read more
Neither approach has a clear advantage over the other – if one approach was always better, chances are that we’d start using it everywhere! Generally speaking, compilers offer the following advantages: Because they can see all the code up-front, they can perform a number of analyses and optimizations when generating code that makes the final … Read more