General utility functions

Usage

compact(.x)

a %||% b

check_dots_named(dots, call = rlang::caller_env())

Arguments

.x

a list

a

an R object

b

an R object

dots

a list collected from dots via rlang::list2(...)

call

default rlang::caller_env(). The caller environment passed to cli::cli_abort()

Value

• compact() a list

• %||% the first non-null item or NULL if both are NULL

Details

• compact() removes any NULL list elements

• %||% is a special pipe operator that returns b if a is NULL

Examples

# remove null elements
compact(list(a = NULL, b = 1))
#> $b
#> [1] 1
#> 

# if NULL return rhs
NULL %||% 123
#> [1] 123

# if not NULL return lhs
123 %||% NULL
#> [1] 123