Using $this inside a static function fails
This is the correct way public static function userNameAvailibility() { $result = self::getsomthin(); } Use self:: instead of $this-> for static methods. See: PHP Static Methods Tutorial for more info 🙂
this
Is it safe to use the “this” pointer in an initialization list?
Yes. It’s safe to use this pointer in initialization-list as long as it’s not being used to access uninitialized members or virtual functions, directly or indirectly, as the object is not yet fully constructed. The object child can store the this pointer of Parent for later use!
Using “this” with class name
Usually, you can use only this. But, sometimes this makes reference to an inner class… so, for example: Button button = (Button)findViewById(R.id.ticket_details_sell_ticket); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // it will be wrong to use only “this”, because it would // reference the just created OnClickListener object Intent login = new Intent(ClassName.this, … Read more
Why does String.prototype log it’s object like a standard object, while Array.prototype logs it’s object like a standard array?
Because in a method call the this argument is always (in sloppy mode) casted to an object. What you see is a String object, which was produced from the “test” primitive string value. The array on which you call your method is already an object, so nothing happens and you just get the array as … Read more
Why can we use ‘this’ as an instance method parameter?
The JLS gives a hint: Either way, the receiver parameter exists solely to allow the type of the represented object to be denoted in source code, so that the type may be annotated. These two methods are equivalent: class Test { void m1() { } void m2(Test this) { } } However the latter allows … Read more
Difference between $(this) and this in jquery
this is the DOM object, whereas $(this) is the jQuery wrapper around same. When using this, you can call DOM methods on it, but not jQuery methods. When using $(this), you can call jQuery methods on it, but not DOM methods.
Save access to this scope
Explanation of the problem this changed The value of thisMDN has changed and is no longer referencing the expected element or value. Often this is because the scope has changed, and as a result so has the this reference. this is contained in an execution context The scope refers to the current Execution ContextECMA. In … Read more
Access “this” from Java anonymous class
Container.this.select();
Preserve ‘this’ reference in javascript prototype event handler [duplicate]
I find bind() being the cleanest solution so far: this.bar.onclick = this.ClickEvent.bind(this); BTW the other this is called that by convention very often.
Use of “this” keyword in C++ [duplicate]
Yes, it is not required and is usually omitted. It might be required for accessing variables after they have been overridden in the scope though: Person::Person() { int age; this->age = 1; } Also, this: Person::Person(int _age) { age = _age; } It is pretty bad style; if you need an initializer with the same … Read more