cw_greplv {crossword.r}

a vectorized version of grep

Description

a vectorized version of grep

Usage

cw_greplv(pattern, x, ignore.case = FALSE, perl = FALSE, fixed = FALSE,
  useBytes = FALSE)

Arguments

pattern

character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Coerced by as.character to a character string if possible. If a character vector of length 2 or more is supplied, the first element is used with a warning. Missing values are allowed except for regexpr and gregexpr.

x

a character vector where matches are sought, or an object which can be coerced by as.character to a character vector. Long vectors are supported.

ignore.case

if FALSE, the pattern matching is case sensitive and if TRUE, case is ignored during matching.

perl

logical. Should Perl-compatible regexps be used?

fixed

logical. If TRUE, pattern is a string to be matched as is. Overrides all conflicting arguments.

useBytes

logical. If TRUE the matching is done byte-by-byte rather than character-by-character. See ‘Details’.