This man page explains how to perform string search-based operations in stringi.
The following independent string searching engines are available in stringi.
stri_*_regex -- ICU's regular expressions (regexes),
see stringi-search-regex,
stri_*_fixed -- locale-independent byte-wise pattern matching,
see stringi-search-fixed,
stri_*_coll -- ICU's StringSearch,
locale-sensitive, Collator-based pattern search,
useful for natural language processing tasks,
see stringi-search-coll,
stri_*_charclass -- character classes search,
e.g., Unicode General Categories or Binary Properties,
see stringi-search-charclass,
stri_*_boundaries -- text boundary analysis,
see stringi-search-boundaries
Each search engine is able to perform many search-based operations. These may include:
stri_detect_* - detect if a pattern occurs in a string,
see, e.g., stri_detect,
stri_count_* - count the number of pattern occurrences,
see, e.g., stri_count,
stri_locate_* - locate all, first, or last occurrences
of a pattern, see, e.g., stri_locate,
stri_extract_* - extract all, first, or last occurrences
of a pattern, see, e.g., stri_extract
and, in case of regexes, stri_match,
stri_replace_* - replace all, first, or last occurrences
of a pattern, see, e.g., stri_replace
and also stri_trim,
stri_split_* - split a string into chunks indicated
by occurrences of a pattern,
see, e.g., stri_split,
stri_startswith_* and stri_endswith_* detect
if a string starts or ends with a pattern match, see,
e.g., stri_startswith,
stri_subset_* - return a subset of a character vector
with strings that match a given pattern, see, e.g., stri_subset.
Other text_boundaries: stri_count_boundaries,
stri_extract_all_boundaries,
stri_locate_all_boundaries,
stri_opts_brkiter,
stri_split_boundaries,
stri_split_lines,
stri_trans_tolower,
stri_wrap,
stringi-search-boundaries
Other search_regex: stri_opts_regex,
stringi-search-regex
Other search_fixed: stri_opts_fixed,
stringi-search-fixed
Other search_coll: stri_opts_collator,
stringi-search-coll
Other search_charclass: stri_trim_both,
stringi-search-charclass
Other search_detect: stri_detect,
stri_startswith
Other search_count: stri_count_boundaries,
stri_count
Other search_locate: stri_locate_all_boundaries,
stri_locate_all
Other search_replace: stri_replace_all,
stri_replace_na,
stri_trim_both
Other search_split: stri_split_boundaries,
stri_split_lines, stri_split
Other search_subset: stri_subset
Other search_extract: stri_extract_all_boundaries,
stri_extract_all,
stri_match_all
Other stringi_general_topics: stringi-arguments,
stringi-encoding,
stringi-locale,
stringi-package,
stringi-search-boundaries,
stringi-search-charclass,
stringi-search-coll,
stringi-search-fixed,
stringi-search-regex