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add new pattern
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creation/25_new/REDME.md
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creation/25_new/REDME.md
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# New pattern
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New 模式
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最最最简单,最最最常用的模式。
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以至于很多地方都不把它当成模式,都已经熟悉到了被忽略的地步,我觉得这是不公平的:),要恢复它地位。
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New模式是就是使用类似New()/new()/NewXXX()之类的方法,返回一个实现了某个接口的对象的引用。
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须要注意的是的:
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+ 一定是返回 结构对象的地址(引用)
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+ 该结构对象往往返回一个实现了某接口的方法.
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creation/25_new/new_test.go
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package newpattern
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import (
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"fmt"
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"testing"
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)
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type homecat interface {
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sleep()
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}
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type blackCat struct {
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name string
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}
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func newBlackCat(name string) homecat{
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return &blackCat{name}
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}
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func (b blackCat) sleep() {
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fmt.Print( b.name + " is sleeping")
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}
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func TestNewMode(t *testing.T){
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cat := newBlackCat("pi")
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cat.sleep()
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}
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