Optional

Optional(patt, default)

or

patt : default

is a pattern which matches patt, which if omitted should be replaced by default.

Examples

>> f(x_, y_:1) := {x, y}

>> f(1, 2)
{1,2}

>> f(a)
{a,1}

Implementation status

• ✅ - full supported

Github

• Implementation of Optional