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PHP 关联数组根据 key 读取 val $val = $arr['key'] 的时间复杂度和空间复杂度分别是多少？

  •   
  •   Nicolay · Jan 2, 2020 · 4695 views
    This topic created in 2504 days ago, the information mentioned may be changed or developed.
  • val
  • arr
  • key'
  • PHP
    3 replies  •  2020-01-02 19:11:55 +08:00
    miaotaizi
    miaotaizi
    Jan 2, 2020 via iPhone
    1
    要什么自行车
    jimmzhou
    jimmzhou
    Jan 2, 2020 via iPhone
    2
    index= hash(key) & (hashtable-1) 根据这个 index 可以获取到 value 所以时间复杂度应该为 O(1)吧
    jimmzhou
    jimmzhou
    Jan 2, 2020 via iPhone
    3
    上面打错了 应该是 hashtablesize-1
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