singleton
singleton(x, value = TRUE)
is.singleton(x)Arguments
| x | A tag, text, HTML, or list. |
|---|---|
| value | Whether the object should be a singleton. |
Description
Use singleton to wrap contents (tag, text, HTML, or lists) that should
be included in the generated document only once, yet may appear in the
document-generating code more than once. Only the first appearance of the
content (in document order) will be used.