rx_whitespace: Match a whitespace character.

In RVerbalExpressions: Create Regular Expressions Easily

Description

Match a whitespace character.

Usage

rx_whitespace(.data = NULL, inverse = FALSE)

Arguments

.data	Expression to append, typically pulled from the pipe %>%
inverse	Invert match behavior, defaults to FALSE (match whitespace). Use TRUE to not match whitespace.

Details

Match a whitespace character (one of space, tab, carriage return, new line, vertical tab and form feed).

1. space: https://codepoints.net/U+0020

2. tab: https://codepoints.net/U+0009

3. carriage return: https://codepoints.net/U+000D

4. new line: https://codepoints.net/U+000

5. vertical tab: https://codepoints.net/U+000B

6. form feed: https://codepoints.net/U+000C

Examples

# match whitespace, default
rx_whitespace()

# dont match whitespace
rx_whitespace(inverse = TRUE)

# create an expression
x <- rx_whitespace()

# create input
string <- "1 apple"

# extract match
regmatches(string, regexpr(x, string))

# extract no whitespace by inverting behavior
y <- rx_whitespace(inverse = TRUE)
regmatches(string, gregexpr(y, string))

RVerbalExpressions documentation built on Nov. 6, 2019, 5:08 p.m.