goang-给type定于方法,用Values和用Pointers的区别

其实effectiv go里面说的很清楚了

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http://weekly.golang.org/doc/effective_go.html#pointers_vs_values

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我这里写了个例子,还是不明白的话,我在详细解释下

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package mainimport "log"type PointerMethodInvoke struct{Foo string}func (this *PointerMethodInvoke) ChangeFoo(foo string){this.Foo = foolog.Println("change Foo,result is :",this.Foo)}type ValueMethodInvoke struct{Foo string}func (this ValueMethodInvoke) ChangeFoo(foo string){this.Foo = foolog.Println("change Foo,result is :",this.Foo)}func main() {pointerMethodInvoke := new(PointerMethodInvoke)pointerMethodInvoke.Foo = "foo"log.Println(pointerMethodInvoke.Foo)pointerMethodInvoke.ChangeFoo("bar")log.Println(pointerMethodInvoke.Foo)valueMethodInvoke := new(ValueMethodInvoke)valueMethodInvoke.Foo = "foo"log.Println(valueMethodInvoke.Foo)valueMethodInvoke.ChangeFoo("bar")log.Println(valueMethodInvoke.Foo)}

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输出:

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2011/12/16 15:03:48 foo

2011/12/16 15:03:48 change Foo,result is : bar

2011/12/16 15:03:48 bar

2011/12/16 15:03:48 foo

2011/12/16 15:03:48 change Foo,result is : bar

2011/12/16 15:03:48 foo