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Fix custom comparator example #271

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Fix custom comparator example #271

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19 changes: 8 additions & 11 deletions examples/customcomparator/customcomparator.go
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Original file line number Diff line number Diff line change
@@ -1,35 +1,32 @@
// Copyright (c) 2015, Emir Pasic. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
"fmt"

"github.com/emirpasic/gods/v2/sets/treeset"
"github.com/emirpasic/gods/sets/treeset"
)

// User model (id and name)
type User struct {
id int
name string
}

// Comparator function (sort by IDs)
func byID(a, b User) int {
// Custom comparator (sort by IDs)
func byID(a, b interface{}) int {
// Type assertion, program will panic if this is not respected
c1 := a.(User)
c2 := b.(User)

switch {
case a.id > b.id:
case c1.id > c2.id:
return 1
case a.id < b.id:
case c1.id < c2.id:
return -1
default:
return 0
}
}

// CustomComparatorExample to demonstrate basic usage of CustomComparator
func main() {
set := treeset.NewWith(byID)

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