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Test if x is a single non-empty character string

Source: R/ninetails_misc_helper_functions.R
is_string.Rd

Base R replacement for checkmate::test_string

Usage

is_string(x, min.chars = 1, null.ok = FALSE)

Arguments

x

Object to test

min.chars

Minimum number of characters (default 1)

null.ok

Allow NULL? (default FALSE)

Value

TRUE if x is a valid string, FALSE otherwise