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rewrite checkpoint
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# Copier
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I am a copier, I copy everything from one to another
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## Features
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* Copy from field to field with same name
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* Copy from method to field with same name
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* Copy from field to method with same name
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* Copy from slice to slice
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* Copy from struct to slice
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## Usage
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```go
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package main
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import (
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"fmt"
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"github.com/jinzhu/copier"
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)
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type User struct {
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Name string
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Role string
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Age int32
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}
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func (user *User) DoubleAge() int32 {
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return 2 * user.Age
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}
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type Employee struct {
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Name string
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Age int32
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DoubleAge int32
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EmployeId int64
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SuperRule string
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}
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func (employee *Employee) Role(role string) {
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employee.SuperRule = "Super " + role
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}
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func main() {
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var (
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user = User{Name: "Jinzhu", Age: 18, Role: "Admin"}
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users = []User{{Name: "Jinzhu", Age: 18, Role: "Admin"}, {Name: "jinzhu 2", Age: 30, Role: "Dev"}}
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employee = Employee{}
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employees = []Employee{}
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)
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copier.Copy(&employee, &user)
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fmt.Printf("%#v \n", employee)
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// Employee{
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// Name: "Jinzhu", // Copy from field
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// Age: 18, // Copy from field
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// DoubleAge: 36, // Copy from method
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// EmployeeId: 0, // Ignored
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// SuperRule: "Super Admin", // Copy to method
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// }
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// Copy struct to slice
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copier.Copy(&employees, &user)
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fmt.Printf("%#v \n", employees)
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// []Employee{
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// {Name: "Jinzhu", Age: 18, DoubleAge: 36, EmployeId: 0, SuperRule: "Super Admin"}
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// }
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// Copy slice to slice
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employees = []Employee{}
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copier.Copy(&employees, &users)
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fmt.Printf("%#v \n", employees)
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// []Employee{
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// {Name: "Jinzhu", Age: 18, DoubleAge: 36, EmployeId: 0, SuperRule: "Super Admin"},
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// {Name: "jinzhu 2", Age: 30, DoubleAge: 60, EmployeId: 0, SuperRule: "Super Dev"},
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// }
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}
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```
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# Supporting the project
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[](http://patreon.com/jinzhu)
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# Author
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**jinzhu**
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* <http://github.com/jinzhu>
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* <wosmvp@gmail.com>
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* <http://twitter.com/zhangjinzhu>
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## License
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Released under the [MIT License](https://github.com/jinzhu/copier/blob/master/License).
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