What does “this” mean in a nodejs module?
this (in the context of a module) is the same as exports in node.js. However you should generally use exports/module.exports instead, so that it’s explicitly clear what you’re modifying.
global
Cannot change global variables in a function through an exec() statement?
Per the docs, the exec statement takes two optional expressions, defaulting to globals() and locals(), and always performs changes (if any) in the locals() one. So, just be more explicit/specific/precise…: >>> def myfunc(): … exec(‘myvar=”boooh!”‘, globals()) … >>> myfunc() >>> myvar ‘boooh!’ …and you’ll be able to clobber global variables to your heart’s contents.
What does nonlocal do in Python 3?
Compare this, without using nonlocal: x = 0 def outer(): x = 1 def inner(): x = 2 print(“inner:”, x) inner() print(“outer:”, x) outer() print(“global:”, x) # inner: 2 # outer: 1 # global: 0 To this, using nonlocal, where inner()‘s x is now also outer()‘s x: x = 0 def outer(): x = 1 … Read more
Static vs global
i has internal linkage so you can’t use the name i in other source files (strictly translation units) to refer to the same object. j has external linkage so you can use j to refer to this object if you declare it extern in another translation unit.
Global dictionaries don’t need keyword global to modify them? [duplicate]
The reason is that the line stringvar = “bar” is ambiguous, it could be referring to a global variable, or it could be creating a new local variable called stringvar. In this case, Python defaults to assuming it is a local variable unless the global keyword has already been used. However, the line dictvar[‘key1’] += … Read more
PHP pass variable to include
You can use the extract() function Drupal use it, in its theme() function. Here it is a render function with a $variables argument. function includeWithVariables($filePath, $variables = array(), $print = true) { $output = NULL; if(file_exists($filePath)){ // Extract the variables to a local namespace extract($variables); // Start output buffering ob_start(); // Include the template file … Read more
What is the ‘global’ object in NodeJS
Value of this in a node module: this in NodeJS global scope is the current module.exports object, not the global object. This is different from a browser where the global scope is the global window object. Consider the following code executed in Node: console.log(this); // logs {} module.exports.foo = 5; console.log(this); // log { foo:5 … Read more
Python nonlocal statement / keyword
Compare this, without using nonlocal: x = 0 def outer(): x = 1 def inner(): x = 2 print(“inner:”, x) inner() print(“outer:”, x) outer() print(“global:”, x) # inner: 2 # outer: 1 # global: 0 To this, using nonlocal, where inner()‘s x is now also outer()‘s x: x = 0 def outer(): x = 1 … Read more
Java – global, reusable loading dialog
Swing uses a single thread model for it’s event dispatching (including paint updates), as such, you should never, ever perform any long running or blocking operations within the Event Dispatching Thread (EDT). Swing is also not thread safe, meaning that you should never create or modify any UI component from outside the EDT. The basic … Read more
Change Button color onClick
There are indeed global variables in javascript. You can learn more about scopes, which are helpful in this situation. Your code could look like this: <script> var count = 1; function setColor(btn, color) { var property = document.getElementById(btn); if (count == 0) { property.style.backgroundColor = “#FFFFFF” count = 1; } else { property.style.backgroundColor = “#7FFF00” … Read more