list_null: Handle Null Values for Text to List Conversions

In mmints: Workflows for Building Web Applications

Handle Null Values for Text to List Conversions

Description

Handle Null Values for Text to List Conversions

Usage

list_null(par_input = "", alt_na = NULL)

Arguments

par_input	A string input, default is "".
alt_na	If alt_na is not set to NULL (the default), then it is an alternative string used to represent NA. Usually, this is a string such as "NA", "NaN", etc

Value

NULL if input is NA, if input is empty, or if input is alt_na (and alt_na is not NULL). Otherwise return a parsed list.

Examples

# Convert missing value to null
list_null()
list_null(NA)
list_null("na", alt_na="na")

# Convert non-missing value to list
list_null("'one' = 1, 'two' = 2, 'three' = 3")

# Convert to null when a single vector is missing
list_null("'one' = 1, 'two' = NA, 'three' = 3", alt_na = "NA")
list_null("'one' = 1, NA, 'three' = 3", alt_na = "NA")

mmints documentation built on April 3, 2025, 9:33 p.m.