Delete a key from an Associative Array
assoc_delete_key (Assoc_Type a, String_Type k)
The assoc_delete_key function deletes a key given by k
from the associative array a. If the specified key does not
exist in a, then this function has no effect.
assoc_key_exists, assoc_get_keys
Return all the key names of an Associative Array
String_Type[] assoc_get_keys (Assoc_Type a)
This function returns all the key names of an associative array
a as an ordinary one dimensional array of strings. If the
associative array contains no keys, an empty array will be returned.
assoc_get_values, assoc_key_exists, assoc_delete_key, length
Return all the values of an Associative Array
Array_Type assoc_get_keys (Assoc_Type a)
This function returns all the values in the associative array
a as an array of proper type. If the associative array
contains no keys, an empty array will be returned.
Suppose that a is an associative array of type
Integer_Type, i.e., it was created via
variable a = Assoc_Type[Integer_Type];
static define int_sort_fun (x, y)
{
return sign (x - y);
}
define sort_and_print_values (a)
{
variable v = assoc_get_values (a);
variable i = array_sort (v, &int_sort_fun);
v = v[i];
foreach (v)
{
variable vi = ();
() = fprintf (stdout, "%d\n", vi);
}
}
assoc_get_values, assoc_key_exists, assoc_delete_key, array_sort
Check to see whether a key exists in an Associative Array
Integer_Type assoc_key_exists (Assoc_Type a, String_Type k)
The assoc_key_exists function may be used to determine whether
or not a specified key k exists in an associative array a.
It returns 1 if the key exists, or 0 if it does not.
assoc_get_keys, assoc_get_values, assoc_delete_key