Detect if strings are matched by a set of unglue patterns

Returns a logical indicating whether input strings were matched by one or more patterns

unglue_detect(
  x,
  patterns,
  open = "{",
  close = "}",
  convert = FALSE,
  multiple = NULL
)

Arguments

x

a character vector to unglue.

patterns

a character vector or a list of character vectors, if a list, items will be pasted using an empty separator ("").

open

The opening delimiter.

close

The closing delimiter.

convert

If TRUE, will convert columns of output using utils::type.convert() with parameter as.is = TRUE, alternatively, can be a converting function, such as readr::type_convert. Formula notation is supported if the package rlang is installed, so things like convert = ~type_convert(., numerals = "warn.loss") are possible.

multiple

The aggregation function to use if several subpatterns are named the same, by default no function is used and subpatterns named the same will match the same value. If a function is provided it will be fed the conflicting values as separate arguments. Formula notation is supported if the package rlang is installed.

Value

a vector of logical.

Examples

sentences <- c("666 is [a number]", "foo is [a word]",
               "42 is [the answer]", "Area 51 is [unmatched]")
patterns <- c("{number=\\d+} is [{what}]", "{word=\\D+} is [{what}]")
unglue_detect(sentences, patterns)
#> [1]  TRUE  TRUE  TRUE FALSE