A comparison of three strategies for computing letter oriented, minimal perfect hashing functions

Author:

Trono John A.1

Affiliation:

1. St. Michael's College, Colchester, VT

Abstract

This paper will discuss improvements to Cichelli's method for computing the set of weights used for minimal perfect hashing functions[1]. The major modifications investigated here pertain to adding a "MOD number_of_keys" operation to the hashing function, and to the removal of unnecessary backtracking due to "guaranteed collisions".

Publisher

Association for Computing Machinery (ACM)

Subject

Computer Graphics and Computer-Aided Design,Software

Reference8 articles.

1. [ 1 ] Minimal Perfect Hashing Functions Made Simple Cichelli. Communications of the ACM Volume 23 #1 1980. 10.1145/358808.358813 [1] Minimal Perfect Hashing Functions Made Simple Cichelli. Communications of the ACM Volume 23 #1 1980. 10.1145/358808.358813

2. [ 2 ] A Letter Oriented Minimal Perfect Hashing Function Cook and Oldehoeft. ACM SIGPLAN Notices Volume 17 #9 1982. 10.1145/947955.947957 [2] A Letter Oriented Minimal Perfect Hashing Function Cook and Oldehoeft. ACM SIGPLAN Notices Volume 17 #9 1982. 10.1145/947955.947957

3. [ 3 ] Hashing for Dynamic and Static Internal Tables Lewis and Cook. IEEE Computer October 1988. 10.1109/2.7056 [3] Hashing for Dynamic and Static Internal Tables Lewis and Cook. IEEE Computer October 1988. 10.1109/2.7056

4. [ 4 ] Practical Minimal Perfect Hash Functions for Large Databases Fox Heath Chen and Daoud. Communications of the ACM Volume 35 #1 1992. 10.1145/129617.129623 [4] Practical Minimal Perfect Hash Functions for Large Databases Fox Heath Chen and Daoud. Communications of the ACM Volume 35 #1 1992. 10.1145/129617.129623

5. [ 5 ] An Undergraduate Project to Compute Minimal Perfect Hashing Functions Trono. SIGCSE Bulletin Volume 24 #3 1992. 10.1145/142040.142077 [5] An Undergraduate Project to Compute Minimal Perfect Hashing Functions Trono. SIGCSE Bulletin Volume 24 #3 1992. 10.1145/142040.142077

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