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ansible-role-version/vendor/github.com/emirpasic/gods/examples/iteratorwithkey.go

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// 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 examples
import (
"fmt"
"github.com/emirpasic/gods/maps/treemap"
)
// IteratorWithKeyExample to demonstrate basic usage of IteratorWithKey
func IteratorWithKeyExample() {
m := treemap.NewWithIntComparator()
m.Put(1, "a")
m.Put(2, "b")
m.Put(3, "a")
it := m.Iterator()
fmt.Print("\nForward iteration\n")
for it.Next() {
key, value := it.Key(), it.Value()
fmt.Print("[", key, ":", value, "]") // [0:a][1:b][2:c]
}
fmt.Print("\nForward iteration (again)\n")
for it.Begin(); it.Next(); {
key, value := it.Key(), it.Value()
fmt.Print("[", key, ":", value, "]") // [0:a][1:b][2:c]
}
fmt.Print("\nBackward iteration\n")
for it.Prev() {
key, value := it.Key(), it.Value()
fmt.Print("[", key, ":", value, "]") // [2:c][1:b][0:a]
}
fmt.Print("\nBackward iteration (again)\n")
for it.End(); it.Prev(); {
key, value := it.Key(), it.Value()
fmt.Print("[", key, ":", value, "]") // [2:c][1:b][0:a]
}
if it.First() {
fmt.Print("\nFirst key: ", it.Key()) // First key: 0
fmt.Print("\nFirst value: ", it.Value()) // First value: a
}
if it.Last() {
fmt.Print("\nLast key: ", it.Key()) // Last key: 3
fmt.Print("\nLast value: ", it.Value()) // Last value: c
}
}