scope

问题 This question already has answers here : What is the meaning of prepended double colon “::”? (9 answers) Closed 12 months ago . I've seen this a few times now, and I've been scratching my head wondering why... As an example: (http://www.codeguru.com/forum/showthread.php?t=377394) void LeftClick ( ) { INPUT Input={0}; // left down Input.type = INPUT_MOUSE; Input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN; ::SendInput(1,&Input,sizeof(INPUT)); // left up ::ZeroMemory(&Input,sizeof(INPUT)); Input.type =

问题 This question already has answers here : What is the meaning of prepended double colon “::”? (9 answers) Closed 12 months ago . I've seen this a few times now, and I've been scratching my head wondering why... As an example: (http://www.codeguru.com/forum/showthread.php?t=377394) void LeftClick ( ) { INPUT Input={0}; // left down Input.type = INPUT_MOUSE; Input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN; ::SendInput(1,&Input,sizeof(INPUT)); // left up ::ZeroMemory(&Input,sizeof(INPUT)); Input.type =

问题 I have the following code, which can also be fiddled on http://jsfiddle.net/garukun/u69PT/. View: <div data-ng-app="testApp"> <div data-ng-controller="testCtrl"> <strong>{{pkey}}</strong> <span data-test-directive data-parent-item="pkey" data-parent-update="update(pkey)"></span> </div> </div> JS: var testApp = angular.module('testApp', []); testApp.directive('testDirective', function ($timeout) { return { scope: { key: '=parentItem', parentUpdate: '&' }, replace: true, template: '<div><p>{

问题 I have the following code, which can also be fiddled on http://jsfiddle.net/garukun/u69PT/. View: <div data-ng-app="testApp"> <div data-ng-controller="testCtrl"> <strong>{{pkey}}</strong> <span data-test-directive data-parent-item="pkey" data-parent-update="update(pkey)"></span> </div> </div> JS: var testApp = angular.module('testApp', []); testApp.directive('testDirective', function ($timeout) { return { scope: { key: '=parentItem', parentUpdate: '&' }, replace: true, template: '<div><p>{

问题 I am a student and I am confused about global and file scope variables in C and C++. Is there is any difference in both perspectives? If yes, please explain in detail. 回答1: A variable with file scope can be accessed by any function or block within a single file. To declare a file scoped variable, simply declare a variable outside of a block (same as a global variable) but use the static keyword. static int nValue; // file scoped variable float fValue; // global variable int main() { double

问题 While constructing expressions to put in the j -slot of a [.data.table call, it would often be helpful to be able to examine and play around with the contents of .SD . This naive attempt doesn't work... library(data.table) DT = data.table(x=rep(c("a","b","c"),each=3), y=c(1,3,6), v=1:9) DT[, browser(), by=x] # Called from: `[.data.table`(DT, , browser(), by = x) Browse[1]> Browse[1]> .SD # NULL data.table ... even though a variable named .SD and several others related to the current data

问题 I'm new to AngularJS and am trying to build myself a simple little app. I have JSON data for the app being fetched with $resource , and this data should be the same across multiple views/routes. However, when I go to a new route, the JSON data (stored as $scope.data ) is no longer available to the new view. What can I do to pass this data to the new view and not require another fetch? (The tutorial phone-catalog app re-fetches this data every time from what I can tell.) From what I understand

问题 When you define a function in Python with an array parameter, what is the scope of that parameter? This example is taken from the Python tutorial: def f(a, L=[]): L.append(a) return L print f(1) print f(2) print f(3) Prints: [1] [1, 2] [1, 2, 3] I'm not quite sure if I understand what's happening here. Does this mean that the scope of the array is outside of the function? Why does the array remember its values from call to call? Coming from other languages, I would expect this behavior only

问题 My company is redoing our website over the next few months, going from a ColdFusion website to one written in Java. I am just learning Java and I am curious as to how I can set application scope variables in a Java web application. ColdFusion has the application.cfm file that holds variables that are accessible by all ColdFusion pages/components within the app. Java obviously does not have a direct equivalent to that file, so I was wondering how to recreate something similar in Java. I want

问题 With the following code I am able to take values out of an object and add them to the global namespace. This is defined in the expose function function expose(key, obj){ window[key] = obj[key]; } I can have been using it to take functions I use a lot out of libraries, such as map from underscore // before map //undefined _.map // have to use like this expose('map', _) // after map // function I would like modify expose so that it does the same job but only in a closure. How to solve this is