Manipulative and Selection Functions

⍴ Monadic
APL: shape of
Q: count
APL gives the length of each axis.
Q gives the length of the top level (first axis) only.

⍴ dyadic
APL: reshape
Q:

≡ Monadic
APL: depth
Q:

≡ dyadic
APL: match (this is a actually comparative function)
Q: use ~