readline_check: Check readline input

In debruine/pdsbuilder: Create Psych-DS Codebooks

Description

Check readline input

Usage

readline_check(
  prompt,
  type = c("numeric", "integer", "length", "grep"),
  min = -Inf,
  max = Inf,
  warning = NULL,
  default = NULL,
  ...
)

Arguments

prompt	the prompt for readline
type	what type of check to perform, one of c("numeric", "integer", "length", "grep")
min	the minimum value
max	the maximum value
warning	an optional custom warning message
default	the default option to return if the entry is blank, NULL allows no default, the default value will be displayed after the text as [default]
...	other arguments to pass to grep

Value

the validated result of readline

Examples

## Not run: 
readline_check("Type a number: ", "numeric")
readline_check("Type two characters: ", "length", min = 2, max = 2)
readline_check("Type at least 3 characters: ", "length", min = 3)
readline_check("Type no more than 4 characters: ", "length", max = 44)
readline_check("Type a letter and a number: ", "grep", pattern = "^[a-zA-Z]\\d$")

## End(Not run)

debruine/pdsbuilder documentation built on July 8, 2020, 9:40 p.m.