• → Through

Operate

WMA link

Operate[p, expr]

applies p to the head of expr.

Operate[p, expr, n]

applies p to the nth head of expr.

• • Operate[p, f[a, b]]

The default value of n is 1:

• • Operate[p, f[a, b], 1]

With n=0, Operate acts like Apply:

• • Operate[p, f[a][b][c], 0]