mirror of
https://github.com/emirpasic/gods
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62 lines
2.6 KiB
Go
62 lines
2.6 KiB
Go
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/*
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Copyright (c) 2015, Emir Pasic
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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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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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