2 push - push one or more values into the front of a list
8 x lvalue whose value is a list
14 If after evaluation of y_0, y_1, ..., x is a list with
15 contents (x_0, x_1, ...), then after push(x, y_0, y_1, ..., y_n-1),
16 x has contents (y_n-1, ..., y_1, y_0, x_0, x_1, ...), i.e. the
17 values of y_0, y_1, ... are inserted in succession at the beginning
20 This function is equivalent to insert(x, 0, y_n-1, ..., y_1, y_0).
26 list (2 elements, 2 nonzero):
33 list (4 elements, 4 nonzero):
39 > push (A, pop(A), pop(A))
42 list (4 elements, 4 nonzero):
49 push() can have at most 100 arguments
55 append, delete, insert, islist, list, pop, remove, rsearch, search, size