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https://github.com/Luzifer/ansible-role-version.git
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41 lines
1.5 KiB
Go
41 lines
1.5 KiB
Go
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// Copyright (c) 2015, Emir Pasic. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package examples
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import (
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"github.com/emirpasic/gods/trees/binaryheap"
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"github.com/emirpasic/gods/utils"
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)
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// BinaryHeapExample to demonstrate basic usage of BinaryHeap
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func BinaryHeapExample() {
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// Min-heap
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heap := binaryheap.NewWithIntComparator() // empty (min-heap)
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heap.Push(2) // 2
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heap.Push(3) // 2, 3
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heap.Push(1) // 1, 3, 2
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heap.Values() // 1, 3, 2
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_, _ = heap.Peek() // 1,true
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_, _ = heap.Pop() // 1, true
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_, _ = heap.Pop() // 2, true
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_, _ = heap.Pop() // 3, true
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_, _ = heap.Pop() // nil, false (nothing to pop)
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heap.Push(1) // 1
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heap.Clear() // empty
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heap.Empty() // true
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heap.Size() // 0
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// Max-heap
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inverseIntComparator := func(a, b interface{}) int {
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return -utils.IntComparator(a, b)
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}
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heap = binaryheap.NewWith(inverseIntComparator) // empty (min-heap)
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heap.Push(2) // 2
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heap.Push(3) // 3, 2
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heap.Push(1) // 3, 2, 1
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heap.Values() // 3, 2, 1
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}
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