scope

问题 Assume there are Java project and Junit project in an Eclipse workspace. And All the unit tests are located in the Junit project and dependent on the application Java project. When making changes to a Java method, I need to find the unit tests that are using the method directly or indirectly, so that I can run the corresponding tests locally in my PC before checking into source control. I don't want to run the entire junit project since it takes time. I could use Eclipse call hierarchy to

问题 In my ColdFusion code, I have made it a habit to always treat the variables scope as my default scope (i.e., when another scope doesn't fit). My understanding is that this improves efficiency, since the ColdFusion processor doesn't have to spend cycles determining the scope in which the variable is contained. However, I've always been annoyed by how verbose this makes my code. So, my question is, realistically, is explicitly scoping every variable worth the verbosity? I understand that each

问题 I've the following doubt. I've a page "MyPage" and i've declared few dictionary objects in the page class. My doubt is If i declare the dictionary as a private non-static object i'm not able to use it across the functions in that page class (the object is getting nulled) But if i declare the dictionary to be static i'm able to across the object across the functions. But will that object be same across all the users who have opened the page right now (guessing that each user will have an

问题 i know this is probably a stupid question and i know js scope questions are extremely common on SO, but could you possibly be kind enough to help me with this one anyway. Here is my function: function checkOpen(storeData) { if (storeData.menu === 'true') { var offerImgPath = '/wcsstore/ConsumerDirectStorefrontAssetStore/images/colors/color'+ Brand.styleColour + '/v3/', offer1, offer2; cafeTabContent = '<p>Cafe/Restaurant facilities are available in this store.</p>'; cafeTabContent += '<p

问题 Here is my problem : I have a class method in my User class. I'm calling it from a class method located in my Shop class. The thing is, the User class method needs the shop's attribute group_id (Group is a third class). My User class method is not working properly (see Rails 3 Scope - Find users not in a specific group) because it returns nothing although it should return something. My code currently looks like this : class User #... # Retrieve all users not in a specific group # example:

问题 For the following Rust program: fn main() { let foo = "test".to_string(); if false { let _bar = foo; // value moved to _bar } println!("{}", foo); } I got this error when run it: error[E0382]: borrow of moved value: `foo` --> src\main.rs:6:20 | 2 | let foo = "test".to_string(); | --- move occurs because `foo` has type `std::string::String`, which does not implement the `Copy` trait 3 | if false { 4 | let _bar = foo; // value moved to _bar | --- value moved here 5 | } 6 | println!("{}", foo);

问题 I have a hash, where the keys and values are from matches in a regular expression. I'm having difficulty extracting the values given the keys. In the interest of brevity and honing in on the problem, my first version of this post I attempted to strip down my program to only the relevant parts, but it wasn't enough, so here's more. Variable and file names have been modified, but the syntax is true. Though the specific regular expressions are irrelevant, I have included them on request. use

问题 I have this: class MyClass: """A simple example class""" i = 12345 def f(self): print i # self.i will work just fine return 'hello world' When I do: >>> x = MyClass() >>> >>> x.f() I get an error, as expected. My question is: Why do I get the error? Why is there no namespace between the namespace of the function(or method) definition and the global namespace of the module containing the class? Is there any other way to reference i inside f in this case other than using self? 回答1: You've got

问题 Can anyone explain to me why "b" returns undefined and how I can get around this problem? Why does the "this" scope get lost when I call prototype functions by reference? MyClass = function(test) { this.test = test; } MyClass.prototype.myfunc = function() { return this.test; } var a = new MyClass('asd').myfunc(); var b = new MyClass('asd').myfunc; // Returns "asd" correctly console.log(a) // Returns undefined?? console.log(b()) === EDIT / SOLUTION === As plalx writes, the correct solution in

问题 I came across a interesting quiz function bar() { return foo; foo = 10; function foo() {} var foo = '11'; } alert(typeof bar()); My interpretation is like this (Which is wrong according to console :) ): var foo; // global variable function bar(){ function foo(){} var foo; // Here variable foo should override foo function return foo; // (according to me foo should be variable with undefined value) What is going on here, How JavaScript resolve naming order ? foo = 10; foo = "11"; } Here is a