Extract

Extract(expr, list)

extracts parts of expr specified by list.

Extract(expr, {list1, list2, ...})

extracts a list of parts.

Examples

Extract(expr, i, j, ...) is equivalent to Part(expr, {i, j, ...}).

>> Extract(a + b + c, {2})
b

>> Extract({{a, b}, {c, d}}, {{1}, {2, 2}})
{{a,b},d}

Implementation status

• ✅ - full supported

Github

• Implementation of Extract