or
From rebus.base v0.0-3
by Richard Cotton
Alternation
Match one string or another.
Usage
or(..., capture = FALSE)x %|% y
or1(x, capture = FALSE)
Arguments
- ...
- Character vectors.
- capture
- A logical value indicating whether or not the result should be captured. See note.
- x
- A character vector.
- y
- A character vector.
Value
A character vector representing part or all of a regular expression.
Note
or
takes multiple character vector inputs and returns a
character vector of the inputs separated by pipes. %|%
is an operator
interface to this function. or1
takes a single character vector and
returns a string collapsed by pipes. When capture
is TRUE
, the values are wrapped in a capture
group (see capture
). When capture
is FALSE
(the
default for or
and or1
), the values are wrapped in a
non-capture group (see token
). When capture
is
NA
, (the case for %|%
) the values are not wrapped in
anything.
References
See Also
Examples
# or takes an arbitrary number of arguments and groups them without capture
# Notice the recycling of inputs
or(letters, month.abb, "foo")
# or1 takes a single character vector
or1(c(letters, month.abb, "foo")) # Not the same as before!
# Capture the group
or1(letters, capture = TRUE)
# Don't create a group
or1(letters, capture = NA)
# The pipe operator doesn't group
letters %|% month.abb %|% "foo"
# Usage
(rx <- or("dog", "cat", "hippopotamus"))
stringi::stri_detect_regex(c("boondoggle", "caterwaul", "water-horse"), rx)
Community examples
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