%or% {rex} | R Documentation |
The special binary function %or%
can be used to specify a set
of optional matches.
describeIn or regular function can also be used, useful for more than 2 arguments.
x %or% y or(...)
x |
A string. |
y |
A string. |
... |
|
Other rex: capture
,
character_class
, counts
,
group
, lookarounds
,
not
, rex
,
shortcuts
, wildcards