Locale-Insensitive Fixed Pattern Matching in

String searching facilities described in this very man page provide a way to locate a specific sequence of bytes in a string. Fixed pattern search engine's settings may be tuned up (for example to perform case-insensitive search), see the stri_opts_fixed function for more details.

Byte Compare

The Knuth-Morris-Pratt search algorithm, with worst time complexity of O(n+p) (n == length(str), p == length(pattern)) is utilized (with some tweaks for very short search patterns). For natural language processing, however, this is not what you probably want. It is because a bitwise match will not give correct results in cases of:

  1. accented letters;
  2. conjoined letters;
  3. ignorable punctuation;
  4. ignorable case,
see also stringi-search-coll. Note that the conversion of input data to Unicode is done as usual.

See Also

Other search_fixed: stri_opts_fixed, stringi-search Other stringi_general_topics: stringi-arguments, stringi-encoding, stringi-locale, stringi-package, stringi-search-boundaries, stringi-search-charclass, stringi-search-coll, stringi-search-regex, stringi-search

  • stringi-search-fixed
Documentation reproduced from package stringi, version 1.1.5, License: file LICENSE

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