pp: Ruby-style string interpolation

In robertzk/productivus: Productivus R productivity suite

Description

Writing strings for messages with variable content often involves a mess of nested calls to paste. Use this function to reduce the clutter created by these.

Usage

pp(..., envir = parent.frame(), sep = "", collapse = "")

Arguments

...	a character vector, or a (possibly nested) list of character vectors.
envir	environment. The environment to fetch values to use in interpolation.
sep	character. Passed into the collapse argument of base::paste.
collapse	character. Passed into the collapse argument of base::paste.

Examples

## Not run: 
  x <- 5
  pp("we assigned ${x} to x")
  x <- "this time we'll use a string"
  pp("we assigned ${x} to x, and the value of x changed")
  .small_env <- new.env()
  .small_env$x <- "this is inside an environment"
  pp("if we declare an environment, we see that x is ${x} there", envir = .small_env)

## End(Not run)

robertzk/productivus documentation built on July 23, 2019, 2:22 p.m.