Like many object-oriented languages, Ruby has separation between methods in the class context and those in the instance context: class Example def self.a_class_method “I’m a class method!” end def an_instance_method “I’m an instance method!” end end When calling them using their native context it works: Example.a_class_method Example.new.an_instance_method When calling them in the wrong context you … Read more
The following will happen: An alert popping up, displaying the value of aa = 10 An alert popping up, saying undefined since you are trying to access a variable x from the global scope, however x is only defined in the scope of function a. An error in your console, ReferenceError: x is not defined. … Read more
Look up the file you will see function(n) You can take the rest from there. Pretty print feature in your debugger will help. But the files from been compressed so have fun figuring out what variables actually mean. 1 solved Unknown variable in JavaScript function
In function main, you call function displayBills, yet the compiler does not know this function at this point (because it is declared/defined later in the file). Either put the definition of displayBills(int dollars) { … before your function main, or put at least a forward declaration of this function before function main: displayBills(int dollars); // … Read more
public function pages($slug, PagesGenerator $pagesGenerator) { $output = $pagesGenerator->getPages($slug); // here is your error: $page is not defined. $id = $page->getId(); // something like this? $id = $output[‘page’]->getId(); return $this->render(‘list.html.twig’, [ ‘output’ => $output, ‘id’ => $id]); } solved How can I get access to service variables?
You are confusing the scope of a variable with the storage duration. As mentioned in the C11 standard, chapter ยง6.2.1, Scopes of identifiers, for file scope […] If the declarator or type specifier that declares the identifier appears outside of any block or list of parameters, the identifier has file scope, which terminates at the … Read more
A closure is a pairing of: A function and A reference to that function’s outer scope (lexical environment) A lexical environment is part of every execution context (stack frame) and is a map between identifiers (i.e. local variable names) and values. Every function in JavaScript maintains a reference to its outer lexical environment. This reference … Read more