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@@ -193,17 +193,17 @@ comments: true
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```swift title="top_k.swift"
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/* 基于堆查找数组中最大的 k 个元素 */
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func topKHeap(nums: [Int], k: Int) -> [Int] {
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// 将数组的前 k 个元素入堆
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var heap = Array(nums.prefix(k))
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// 初始化一个小顶堆,并将前 k 个元素建堆
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var heap = Heap(nums.prefix(k))
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// 从第 k+1 个元素开始,保持堆的长度为 k
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for i in stride(from: k, to: nums.count, by: 1) {
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// 若当前元素大于堆顶元素,则将堆顶元素出堆、当前元素入堆
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if nums[i] > heap.first! {
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heap.removeFirst()
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heap.insert(nums[i], at: 0)
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if nums[i] > heap.min()! {
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_ = heap.removeMin()
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heap.insert(nums[i])
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}
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}
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return heap
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return heap.unordered
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}
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```
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