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40 lines
638 B
Go
40 lines
638 B
Go
10 years ago
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package examples
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import (
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"fmt"
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"github.com/emirpasic/gods/sets/treeset"
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)
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type User struct {
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id int
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name string
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}
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// Comparator function (sort by IDs)
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func byID(a, b interface{}) int {
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// Type assertion, program will panic if this is not respected
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c1 := a.(User)
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c2 := b.(User)
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switch {
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case c1.id > c2.id:
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return 1
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case c1.id < c2.id:
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return -1
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default:
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return 0
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}
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}
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func exampleCustomComparator() {
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set := treeset.NewWith(byID)
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set.Add(User{2, "Second"})
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set.Add(User{3, "Third"})
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set.Add(User{1, "First"})
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set.Add(User{4, "Fourth"})
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fmt.Println(set) // {1 First}, {2 Second}, {3 Third}, {4 Fourth}
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}
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