check_single: Checks a set of variables are all of length one

In interfacer: Define and Enforce Contracts for Dataframes as Function Parameters

Checks a set of variables are all of length one

Description

Checks a set of variables are all of length one

Usage

check_single(
  ...,
  .message = "`{param}` is not length one: ({err}).",
  .env = rlang::caller_env()
)

Arguments

...	a list of symbols
.message	a glue specification containing {param} as the name of the parameter and {err} the cause of the error
.env	the environment to check (defaults to calling environment)

Value

nothing. called for side effects. throws error if not all variables can be coerced.

Examples

a = 1
b = "Hello"
g = NA
check_single(a,b,g)

c= c(1,2,3)
d=list(a,b)
try(check_single(c,d,missing))

interfacer documentation built on April 4, 2025, 6:13 a.m.