add_to_list/2—add an element at the beginning of a list slot

The add_to_list/2 operation adds an element at the beginning of a list  slot. The syntax for this function is as follows:

add_to_list($ELEM,$LISTSLOT)

add_to_list/2 arguments

Argument

Mode

Type

Description

$ELEM

Input

ANY

Specifies the element to add to the list

$LISTSLOT

Input

SLOTREF

Specifies the list slot to which the element is to be added

Use the add_to_list/2 operation to add the value of $ELEM as the first element of the list slot $LISTSLOT.

This primitive fails if the indicated slot is not a list slot, or if the type of the element does not correspond to the type of the elements of the list.

add_to_list/2 example

add_to_list(my_slot,$E.mc_bad_slot_names);
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