From inside a static method, you can also create a new document by doing : schema.statics.createUser = function(callback) { var user = new this(); user.phone_number = “jgkdlajgkldas”; user.save(callback); };
The Vector3.Normalize() method has a pointer receiver, so in order to call this method, a pointer to Vector3 value is required (*Vector3). In your first example you store the return value of Vector3.Minus() in a variable, which will be of type Vector3. Variables in Go are addressable, and when you write diff.Normalize(), this is a … Read more
Quite easy. someArray.indexOf you know that this is a function, which is also an object and can have properties. By doing someArray.indexOf[someObject], you are trying to reach the property with the key valued to the value of someObject. Of course, it is not defined on the indexOf function, so it returns undefined. Quick example that … Read more
Use reflection: Method method = WhateverYourClassIs.class.getDeclaredMethod(“Method” + MyVar); method.invoke();
Well sure! Let’s assume that you have in interface IMyCollection. It has a method boolean isMutable(). Now you have two classes, class MyMutableList and class MyImmutableList, which both implement IMyCollection. Each of them would override the instance method isMutable(), with MyMutableList simply returning true and MyImmutableList returning false. isMutable() in both classes is an instance … Read more
You have to declare the slice type with type parameters you want to use for the Map() (or for any other) method: type slice[E, V any] []E And you have to add the type parameters to the receiver, without the constraints (those will be the same as defined at the type declaration), as if you’d … Read more
Eclipse can’t work out the arguments because it can’t find the source or javadoc attachments. Make sure your source is attached. To check, click on the method call readXXX and press F3 which should open the method declaration. If the source is not attached, Eclipse will say “Source not found” and will allow you to … Read more
In JavaScript Functions are first class Objects. When you define a function, it is the constructor for that function object. In other words: var gmap = function() { this.add = function() { alert(‘add’); return this; } this.del = function() { alert(‘delete’); return this; } if (this instanceof gmap) { return this.gmap; } else { return … Read more
Although you can prototype on the HTMLElement in many browsers – Internet Explorer (6,7,8) is NOT one of them. AFAIK, IE9 does support this (though I haven’t tested it). For browsers that do handle it, you can do: HTMLElement.prototype.doHello = function(thing){ console.log(this + ‘ says: ‘ + thing) } document.body.doHello(‘hello’)