48 lines
837 B
Go
48 lines
837 B
Go
// ## Sorting by Functions
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package main
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import ("fmt" ; "sort")
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type Person struct {
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Name string
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Age int
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}
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type ByName []Person
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func (this ByName) Len() int {
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return len(this)
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}
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func (this ByName) Less(i, j int) bool {
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return this[i].Name < this[j].Name
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}
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func (this ByName) Swap(i, j int) {
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this[i], this[j] = this[j], this[i]
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}
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type ByAge []Person
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func (this ByAge) Len() int {
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return len(this)
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}
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func (this ByAge) Less(i, j int) bool {
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return this[i].Age < this[j].Age
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}
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func (this ByAge) Swap(i, j int) {
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this[i], this[j] = this[j], this[i]
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}
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func main() {
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kids := []Person{
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{"Jack", 10},
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{"Jill", 9},
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{"Bob", 12},
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}
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fmt.Println("Original:", kids)
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sort.Sort(ByName(kids))
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fmt.Println("ByName: ", kids)
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sort.Sort(ByAge(kids))
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fmt.Println("ByAge: ", kids)
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}
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