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单词 hash function
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hash function
hash function n. a function whose output values are all the same number of bits in length; esp. one used to encrypt or compress data, or to generate indices when organizing or storing data in a computer.
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1966 R. F. Arnold et al. Math. Models Information Syst. (Rome Air Devel. Center Techn. Rep. No. TR-66-37) 36 The algorithm computes f, sometimes called a hash function, which maps K into A.
1990 Cache Theory Question (UNIX) in comp.os.research (Usenet newsgroup) 25 Feb. I quickly found that hash functions which involved prime numbers gave much better results..than did ones without a prime involved.
2013 C.-H. Wu & J. D. Irwin Introd. Computer Networks & Cybersecurity vi. 224 Error detection typically employs a hash function or checksum technique in which a fixed number of bits are adjoined to the data.
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