get_val2: Get value or return default if invalid

In raveio: File-System Toolbox for RAVE Project

Get value or return default if invalid

Description

Get value or return default if invalid

Usage

get_val2(x, key = NA, default = NULL, na = FALSE, min_len = 1L, ...)

Arguments

x	a list, or environment, or just any R object
key	the name to obtain from x. If NA, then return x. Default is NA
default	default value if
na, min_len, ...	passed to is_valid_ish

Value

values of the keys or default is invalid

Examples

x <- list(a=1, b = NA, c = character(0))

# ------------------------ Basic usage ------------------------

# no key, returns x if x is valid
get_val2(x)

get_val2(x, 'a', default = 'invalid')



# get 'b', NA is not filtered out
get_val2(x, 'b', default = 'invalid')

# get 'b', NA is considered invalid
get_val2(x, 'b', default = 'invalid', na = TRUE)



# get 'c', length 0 is allowed
get_val2(x, 'c', default = 'invalid', min_len = 0)

# length 0 is forbidden
get_val2(x, 'c', default = 'invalid', min_len = 1)

raveio documentation built on July 26, 2023, 5:29 p.m.