Why is one_of() called that? : <p>Why is <code>dplyr::one_of()</code> called that? All the other <code>select_helpers</code> names make sense to me, so I'm wondering if there's an aspect of <code>one_of()</code> that I don't understand.</p>

<p>My understanding of <code>one_of()</code> is that it just lets you select variables using a character vector of their names instead of putting their names into the <code>select()</code> call, but then you get all of the variables whose names are in the vector, not just <strong>one of</strong> them. Is that wrong, and if it's correct, where does the name <code>one_of()</code> come from?</p>
