R: Create or populate an environment with parametrized active...

create_env {bindr}

R Documentation

Create or populate an environment with parametrized active bindings

Leverages makeActiveBinding() by allowing parametrized functions that take the name of the binding and an arbitrary number of additional arguments.

create_env(names, fun, ..., .envir = parent.frame(),
  .enclos = parent.frame())

populate_env(env, names, fun, ..., .envir = parent.frame())

`names`	A name, or a list of names, or a character vector; in the latter case the names are mangled if they are not representable in the native encoding
`fun`	A function with at least one argument, which will be called to compute the value of a binding. The function will be called with the binding name as first argument (unnamed), and `...` as additional arguments
`...`	Additional arguments to `fun`
`.envir`	The environment in which `fun` will be executed, important if `fun` calls other functions that are not globally visible
`.enclos`	The enclosing environment (`parent.env`) for the newly created environment
`env`	An environment

env <- create_env(letters, paste0, "-lowercase")
env$a
env$c
env$Z
populate_env(env, LETTERS, paste0, "-uppercase")
env$a
env$Z

[Package bindr version 0.1.1 Index]