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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/search.R
\name{about_search}
\alias{about_search}
\alias{search}
\alias{stringi-search}
\title{String Searching}
\description{
This man page explains how to perform string search-based
operations in \pkg{stringi}.
}
\details{
The following independent string searching engines are available
in \pkg{stringi}.
\itemize{
\item \code{stri_*_regex} -- \pkg{ICU}'s regular expressions (regexes),
see \link{about_search_regex},
\item \code{stri_*_fixed} -- locale-independent byte-wise pattern matching,
see \link{about_search_fixed},
\item \code{stri_*_coll} -- \pkg{ICU}'s \code{StringSearch},
locale-sensitive, Collator-based pattern search,
useful for natural language processing tasks,
see \link{about_search_coll},
\item \code{stri_*_charclass} -- character classes search,
e.g., Unicode General Categories or Binary Properties,
see \link{about_search_charclass},
\item \code{stri_*_boundaries} -- text boundary analysis,
see \link{about_search_boundaries}
}
Each search engine is able to perform many search-based operations.
These may include:
\itemize{
\item \code{stri_detect_*} - detect if a pattern occurs in a string,
see, e.g., \code{\link{stri_detect}},
\item \code{stri_count_*} - count the number of pattern occurrences,
see, e.g., \code{\link{stri_count}},
\item \code{stri_locate_*} - locate all, first, or last occurrences
of a pattern, see, e.g., \code{\link{stri_locate}},
\item \code{stri_extract_*} - extract all, first, or last occurrences
of a pattern, see, e.g., \code{\link{stri_extract}}
and, in case of regexes, \code{\link{stri_match}},
\item \code{stri_replace_*} - replace all, first, or last occurrences
of a pattern, see, e.g., \code{\link{stri_replace}}
and also \code{\link{stri_trim}},
\item \code{stri_split_*} - split a string into chunks indicated
by occurrences of a pattern,
see, e.g., \code{\link{stri_split}},
\item \code{stri_startswith_*} and \code{stri_endswith_*} detect
if a string starts or ends with a pattern match, see,
e.g., \code{\link{stri_startswith}},
\item \code{stri_subset_*} - return a subset of a character vector
with strings that match a given pattern, see, e.g., \code{\link{stri_subset}}.
}
}
\seealso{
The official online manual of \pkg{stringi} at \url{https://stringi.gagolewski.com/}
Gagolewski M., \pkg{stringi}: Fast and portable character string processing in R, \emph{Journal of Statistical Software} 103(2), 2022, 1-59, \doi{10.18637/jss.v103.i02}
Other text_boundaries:
\code{\link{about_search_boundaries}},
\code{\link{stri_count_boundaries}()},
\code{\link{stri_extract_all_boundaries}()},
\code{\link{stri_locate_all_boundaries}()},
\code{\link{stri_opts_brkiter}()},
\code{\link{stri_split_boundaries}()},
\code{\link{stri_split_lines}()},
\code{\link{stri_trans_tolower}()},
\code{\link{stri_wrap}()}
Other search_regex:
\code{\link{about_search_regex}},
\code{\link{stri_opts_regex}()}
Other search_fixed:
\code{\link{about_search_fixed}},
\code{\link{stri_opts_fixed}()}
Other search_coll:
\code{\link{about_search_coll}},
\code{\link{stri_opts_collator}()}
Other search_charclass:
\code{\link{about_search_charclass}},
\code{\link{stri_trim_both}()}
Other search_detect:
\code{\link{stri_detect}()},
\code{\link{stri_startswith}()}
Other search_count:
\code{\link{stri_count_boundaries}()},
\code{\link{stri_count}()}
Other search_locate:
\code{\link{stri_locate_all_boundaries}()},
\code{\link{stri_locate_all}()}
Other search_replace:
\code{\link{stri_replace_all}()},
\code{\link{stri_replace_rstr}()},
\code{\link{stri_trim_both}()}
Other search_split:
\code{\link{stri_split_boundaries}()},
\code{\link{stri_split_lines}()},
\code{\link{stri_split}()}
Other search_subset:
\code{\link{stri_subset}()}
Other search_extract:
\code{\link{stri_extract_all_boundaries}()},
\code{\link{stri_extract_all}()},
\code{\link{stri_match_all}()}
Other stringi_general_topics:
\code{\link{about_arguments}},
\code{\link{about_encoding}},
\code{\link{about_locale}},
\code{\link{about_search_boundaries}},
\code{\link{about_search_charclass}},
\code{\link{about_search_coll}},
\code{\link{about_search_fixed}},
\code{\link{about_search_regex}},
\code{\link{about_stringi}}
}
\concept{search_charclass}
\concept{search_coll}
\concept{search_count}
\concept{search_detect}
\concept{search_extract}
\concept{search_fixed}
\concept{search_in}
\concept{search_locate}
\concept{search_regex}
\concept{search_replace}
\concept{search_split}
\concept{search_subset}
\concept{stringi_general_topics}
\concept{text_boundaries}
\author{
\href{https://www.gagolewski.com/}{Marek Gagolewski} and other contributors
}
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