# Introducing wrapr::bc()

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The `wrapr`

`R`

package supplies a number of substantial programming tools, including the `S3`

/`S4`

compatible dot-pipe, `unpack`

/`pack`

object tools, and many more. It also supplies a number of formatting and parsing convenience tools:

(“quoting concatenate”): quotes strings, giving value-oriented interfaces much of the incidental convenience of non-standard evaluation (NSE) interfaces.`qc()`

**map_to_char()**: prints maps and vectors as executable code..: allows proper value-oriented programming over non-standard evaluation (NSE) interfaces.`let()`

I am excited to share one more such convenience interface: `bc()`

(“blank concatenate”). `bc()`

takes a single string argument, parses it, and builds up a vector of the described values.

`bc()`

is easy to demonstrate.

library(wrapr) x <- 1 y <- 2 ls() # result not easy to paste back into R # [1] "x" "y" # the bc() fix bc('"x" "y"') # [1] "x" "y" # the map_to_char() fix map_to_char(ls()) # [1] "c('x', 'y')"

I myself find these solutions a bit more convenient than the usual `dump()`

, `deparse()`

, `dput()`

, `eval()`

, or `parse()`

.

`bc()`

requires the outer quotes, but not the internal quotes. That is: `bc('x y')`

and `bc('x,y')`

are also equivalent to `c("x", "y")`

.

And that is some of the tools that make using `R`

results and error messages to progress on projects by producing new `R`

code easier. These are small things, but they can help keep one in the flow when working with data. Also, a thank you to Emil Erik Pula Bellamy Begtrup-Bright for suggesting the new functionality.

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