scope
How to use a global variable in a function?
You can use a global variable within other functions by declaring it as global within each function that assigns a value to it: globvar = 0 def set_globvar_to_one(): global globvar # Needed to modify global copy of globvar globvar = 1 def print_globvar(): print(globvar) # No need for global declaration to read value of globvar … Read more
C++ redeclaration of loop count variable inconsistent behaviour?
According to the standard specification: 1 … names declared in the for-init-statement are in the same declarative-region as those declared in the condition 3 If the for-init-statement is a declaration, the scope of the name(s) declared extends to the end of the for-statement. [ยง6.5.3] and 4 Names declared in the for-init-statement, the for-range-declaration, and in … Read more
Spring Service default scope
Which is the default scope of a Spring 4 @Service? The default scope is singleton It is reasonable to design a Service implementation in order to store some info, related to the current logged user (according to the current HTTP session) Yes. In that case, the service will have to have the scope “session”. See … Read more
array.length is zero, but the array has elements in it [duplicate]
readdir is asynchronous. It won’t get the results right away. You should use the filePaths inside the callback. The only reason why the console shows the value is because the console evaluates the array when you unfold it. When you press the little arrow on the left, put the mouse on the i box on … Read more
What happens when JavaScript variable name and function name is the same?
Functions are a type of object which are a type of value. Values can be stored in variables (and properties, and passed as arguments to functions, etc). A function declaration: Creates a named function Creates a variable in the current scope with the same name as the function (unless such a variable already exists) Assigns … Read more
Generating functions inside loop with lambda expression in python [duplicate]
As others have stated, scoping is the problem. Note that you can solve this by adding an extra argument to the lambda expression and assigning it a default value: >> def makeFun(i): return lambda: i … >>> a = [makeFun(i) for i in range(10)] >>> b = [lambda: i for i in range(10)] >>> c … Read more
Creating master-detail pages for entities, how to link them and which bean scope to choose
What is the correct usage of session scope Use it for session scoped data only, nothing else. For example, the logged-in user, its settings, the chosen language, etcetera. See also: How to choose the right bean scope? And every time I visit the page, the product list will be created from the latest entries in … Read more
JavaScript variable binding and loop
Not really anything more than the two ways that you have proposed, but here’s another for(var it = 0; it < 2; it++) { (function() { var m = it; setTimeout(function() { alert(m); }, 1); })(); } Essentially, you need to capture the variable value in a closure. This method uses an immediately invoked anonymous … Read more
In AngularJS, how do you find all the scopes on a page?
you can see all of the scopes on the page using this CSS selector .ng-scope { border: 1px solid red; } and all of the bindings: .ng-binding { border: 1px solid red; } You can then retrieve them by converting the DOM element into selector var selector = angular.element(some_dom_element); Then use the selector to retrive … Read more