p... or RepeatedNull[p]
is a pattern object that represents a sequence of zero or more expressions, each matching p.
represents from 0 to max expressions matching p.
represents between min and max expressions matching p.
- p... can appear as an argument of any function. It represents any sequence of arguments.
- All the objects in the sequence represented by p... must match p, but the objects need not be identical.
- The expression p may, but need not, itself be a pattern object.
Basic Examples (2)
Replace any list of zero or more a's by x:
Replace any list of zero or more f's with one argument: