scope

问题 Nowdays, i create a .js file with a lot of functions and then I link it to my html pages. That's working but I want to know what's the best way (good practices) to insert js in my pages and avoid conflicts with scope... Thank you. 回答1: You could wrap them in an anonymous function like: (function(){ /* */ })(); However, if you need to re-use all of the javascript functions you've written elsewhere (in other scripts), you're better off creating a single global object on which they can be

问题 Nowdays, i create a .js file with a lot of functions and then I link it to my html pages. That's working but I want to know what's the best way (good practices) to insert js in my pages and avoid conflicts with scope... Thank you. 回答1: You could wrap them in an anonymous function like: (function(){ /* */ })(); However, if you need to re-use all of the javascript functions you've written elsewhere (in other scripts), you're better off creating a single global object on which they can be

问题 I'm trying to generate an n-level hierarchical unordered list with anugularJS, and have been able to successfully do so. But now, I'm having scope issues between the directive and controller. I need to change a scope property of the parent from within a function called via ng-click in the directive template. See http://jsfiddle.net/ahonaker/ADukg/2046/ - here's the JS var app = angular.module('myApp', []); //myApp.directive('myDirective', function() {}); //myApp.factory('myService', function(

问题 What is the difference between declaring an ivar within an @interface versus putting a variable within an @implementation in a .m file? @interface MyClass : NSObject { int num; } - (void)doSomething; @end vs. @implementation MyClass int num2; - (void)doSomething { num = 137; num2 = 138; } @end Is there ever a time when you want to put a variable within the @implementation ? 回答1: The difference between using an ivar and declaring a variable inside the implementation is that the variable within

问题 Does singleton/session scopes of Spring beans require that access to all its fields must be synchronized? Say through "synchronized" keyword or using some classes from package "java.util.concurrent". As example, is this code not thread safe? (copy/pased from here): @Component @SessionScoped public class ShoppingCart { private List<Product> items = new ArrayList<Product>(); public List<Product> getAllItems() { return items; } public void addItem(Product item) { items.add(item); } } 回答1: When

问题 I'm running in circles with this one. I have some tasks on an HttpClient (.NET 4 with httpclient package from NuGet), in one of them i'm trying to assign a value to a variable that i declared OUTSIDE the task, at the beggining of the function, but when the execution gets to that point, the variable lost the assigned value and came back to the initial value, like it never changed. But I'm pretty sure it DID change at a moment, when the execution passed through the task. I've made this

问题 I'm running in circles with this one. I have some tasks on an HttpClient (.NET 4 with httpclient package from NuGet), in one of them i'm trying to assign a value to a variable that i declared OUTSIDE the task, at the beggining of the function, but when the execution gets to that point, the variable lost the assigned value and came back to the initial value, like it never changed. But I'm pretty sure it DID change at a moment, when the execution passed through the task. I've made this

问题 I have code that looks like this: var baseClass = function() { // CODE var subClass = function() { // MORE CODE } } Adding methods to baseClass is fine, I just use baseClass.prototype.newMethod = function () { // NEW CODE } My question is how should I add methods to subClass? Is the only way to simply make it a public method? ######## EDIT ############## OK so I've rearranged the code so the subClass is outside the baseClass. I pass in baseClass so subClass can still access the properties of

问题 I have code that looks like this: var baseClass = function() { // CODE var subClass = function() { // MORE CODE } } Adding methods to baseClass is fine, I just use baseClass.prototype.newMethod = function () { // NEW CODE } My question is how should I add methods to subClass? Is the only way to simply make it a public method? ######## EDIT ############## OK so I've rearranged the code so the subClass is outside the baseClass. I pass in baseClass so subClass can still access the properties of

问题 What exactly are the Python scoping rules? If I have some code: code1 class Foo: code2 def spam..... code3 for code4..: code5 x() Where is x found? Some possible choices include the list below: In the enclosing source file In the class namespace In the function definition In the for loop index variable Inside the for loop Also there is the context during execution, when the function spam is passed somewhere else. And maybe lambda functions pass a bit differently? There must be a simple