Extract all occurrences of a pattern in a string

re_findall extracts all occurrences of a specified pattern (regular expression) from each element of a character vector. If the provided pattern is not already a compiled pattern object, it compiles it using re_compile.

Usage

re_findall(pattern, string, ...)

Arguments

pattern

A regular expression pattern or a compiled pattern object.

string

A character vector where each element is a string from which to extract matches of the pattern.

...

Arguments passed on to re_compile

IGNORECASE

Flag to indicate case-insensitive matching.

I

Abbreviation for IGNORECASE.

MULTILINE

Flag to indicate multi-line matching, where ^ and $ match the start and end of each line.

M

Abbreviation for MULTILINE.

DOTALL

Flag to indicate that . (dot) should match any character including newline.

S

Abbreviation for DOTALL

VERBOSE

Flag to allow a more verbose regex syntax, which can include comments and whitespace for readability.

X

Abbreviation for VERBOSE

NOFLAG

Flag to indicate that no flags should be set.

Value

A list of character vectors, where each vector contains all the matches found in the corresponding element of string.

See also

Python re.findall() documentation

Examples

pattern <- re_compile("\\b\\w+\\b")
re_findall(pattern, "This is a test.") # Extracts all words
#> [[1]]
#> [1] "This" "is"   "a"    "test"
#> 
re_findall("\\d+", "123 abc 456")
#> [[1]]
#> [1] "123" "456"
#>