this

问题 I've recently been working on detouring functions (only in Linux) and so far I've had great success. I was developing my own detouring class until I found this. I modernized the code a bit and converted it to C++ (as a class of course). That code is just like any other detour implementation, it replaces the original function address with a JMP to my own specified 'hook' function. It also creates a 'trampoline' for the original function. Everything works flawlessly but I'd like to do one

问题 Is this a valid selector? If not, what's the correct way? $($(this)+' childElement').... 回答1: Use $(this).find("childrenSelector") 回答2: This may be what you are looking for: $('childElement', $(this)) Basically it will search for childElement within the context of the current element, this . For more information, see the documentation for the jQuery() function. In particular, the following excerpt explains the second argument and how it is equivalent to using find : By default, selectors

问题 I am using a script on this page which does everything I want it to, i.e. changing the colour of the leaves in the nav bar on hover, fading between pages using a hash method, and the sliding of a contact form. The only thing that isn't working is the fading out of the .current div in the non-active nav links (i.e. when the user clicks on a leaf to change the page, I would like the green leaf on the page that has been left to fade out). I was hoping that adding this code would handle the

问题 Prototypical function bar is executed elsewhere, in a Node.js environment (where bind should be available). I want this inside bar() function to be the instance of my object : var Foo = function (arg) { this.arg = arg; Foo.prototype.bar.bind(this); }; Foo.prototype.bar = function () { console.log(this); // Not my object! console.log(this.arg); // ... thus this is undefined } var foo = new Foo(); module.execute('action', foo.bar); // foo.bar is the callback ... why bar() logs undefined and

问题 I am kind-of new to react and having trouble getting value of a radio button generated from a loop. I have a fiddle set-up at: https://jsfiddle.net/rexonms/zrax0zfa/. The example has two type of radio buttons. One group is generated using loop and the other one without loop. The one without loop works (logs the value of the button) but the ones created with the loop doesn't work when I try to console log the value of the radio button. Thank you in advance. var Inputs = React.createClass({

问题 This is ALMOST the same as every other this scoping question I have read so far other than one slight difference which makes it relevant (imo) to ask this question. Now originally my problem was scoping of this with Knockout and Typescript, so given the following: class ViewModel { public SomeObservableArray = new ko.observableArray(); public AddToTheObservableArray(someJsonData: any) { this.SomeObservableArray.push(new SomePojo(someJsonData)); } } So the this bit in the above code would blow

问题 So I am having a problem understanding how eval works with this in typescript/angular. Could someone please help me get the eval to work here? This is just a demo program so just ignore the fact that the logic doesn't make sense. I would just like to have eval update a dynamic array with a dynamic value. https://stackblitz.com/edit/angular-pfyt7q?file=src%2Fapp%2Fapp.component.ts export class AppComponent { arrTest1 = []; arrTest2 = []; arrTest3 = []; constructor() { this.TestClass.Run("this

问题 I don't understand the following: var x = function() { this.foo="foo"; return function() { this.bar = "bar"; return foo+bar; }; }(); // returns inner alert(x()); // 'foobar', so both 'this' variables are set alert(x.bar); // undefined - but wasn't it used correctly? alert(new x().bar); // ok, works My assumption was that a default 'this' scope/variable-map is generated and used the first time, and then when 'new' is called, a new object (function?) with a new 'this' is sent through and

问题 I searched online for similar question, but could not find it. So, posting here. In the following program why the value of 'i' is printed as 100? AFAIK 'this' refers to the current object; which in this case is 'TestChild' and the class name is also correctly printed. But why the value of the instance variable is not 200? public class TestParentChild { public static void main(String[] args) { new TestChild().printName(); } } class TestChild extends TestParent{ public int i = 200; } class

问题 I am trying to understand how the this keyword works in JavaScript and I made this script: function click(){ this.innerHTML="changed"; } Used in this HTML: <button id="clicker" onclick="click()" >Click me</button> But it doesn't work, can anyone explain why? 回答1: this exists only in the scope of the onclick event itself. It is not bound automatically to other functions. Pass it on like this: function click(element){ element.innerHTML="changed"; } and the html: <button id="clicker" onclick=