Go Language Programming (12) type system initialization

This is a creation in Article, where the information may have evolved or changed.

After you define a rect type, how do you create and initialize an object instance of the Rect type? This can be done in several ways:

Rect1: =new(Rect)

Rect2: =&Rect{}

rect3  :=    &  rect{ 0     0  ,  Span style= "COLOR: #c0c0c0" >  100  ,  Span style= "COLOR: #c0c0c0" >  200  }  

Rect4: =&Rect{width:  height:

In the go language, a variable that is not explicitly initialized is initialized to a value of 0 for that type, for example, a value of 0 for a bool type of type False,int 0 to a value of 0,string type is an empty string of 0.

There is no concept of constructors in the go language, the creation of objects is usually done by a global creation function, named by Newxxx, to represent "constructors":

func    newrect ( x   y    width   Height  float64  )    *  Rect   { 

  return& Rect (x, y, width  ,height)

}