V2EX in-place-sort

In-place sort

Definition / 定义

in-place sort(原地排序):一种排序方法,在不使用(或只使用极少)额外内存的情况下,直接在原数据结构(常见为数组)内部交换元素完成排序。
(在算法语境中常与 out-of-place sort“非原地排序”对比。)

Pronunciation / 发音

/nples srt/

Examples / 例句

Insertion sort is an in-place sort.
插入排序是一种原地排序。

To reduce memory use, the engineer chose an in-place sort that rearranges the array without allocating extra storage.
为了减少内存占用,工程师选择了原地排序,它在不分配额外存储的情况下重排数组。

Etymology / 词源

in-place 来自计算机领域的常用表达,字面意思是“在原位置”,引申为“直接在原数据所在位置进行修改/处理”。sort 源自古法语 sortir(“分类、排列”相关含义)及其后续演变,在英语中固定为“排序、分类”。组合成 in-place sort,强调排序过程中数据“就地”被重排。

Related Words / 相关词

Literary Works / 文学与著作示例

  • _Introduction to Algorithms_(《算法导论》, Cormen et al.):讨论排序算法的空间复杂度时常提到“in-place”性质。
  • _The Art of Computer Programming_(《计算机程序设计艺术》, Donald Knuth):在排序与查找相关卷册中涉及原地重排与空间开销。
  • _Algorithms_(《算法》, Robert Sedgewick & Kevin Wayne):讲解快速排序、堆排序等时,会强调哪些算法是 in-place。
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