Computer Science – Data Structures and Algorithms
Scientific paper
2010-12-06
Computer Science
Data Structures and Algorithms
10 pages
Scientific paper
In this note we present the worst-character rule, an efficient variation of the bad-character heuristic for the exact string matching problem, firstly introduced in the well-known Boyer-Moore algorithm. Our proposed rule selects a position relative to the current shift which yields the largest average advancement, according to the characters distribution in the text. Experimental results show that the worst-character rule achieves very good results especially in the case of long patterns or small alphabets in random texts and in the case of texts in natural languages.
Cantone Domenico
Faro Simone
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