Description Usage Arguments Value Examples
The operator is useful as a way of providing a default value
in case the output of another function is NULL
or its length is
zero.
1 | a %if_null_or_len0% b
|
a |
An expression. |
b |
An alternative. |
If !is.null(a) & length(a) > 0 & nchar(a) > 0
is TRUE
returns a
, otherwise returns b
.
1 2 3 4 5 6 7 8 9 10 11 12 13 |
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