Removes the mapping for a key from the specified
associative array if it is present. More formally,
if the associative array contains a mapping
from key <tt>k</tt> to value <tt>v</tt> such that
(key==null ? k==null : key.equals(k))
, that mapping
is removed. (The associative array can contain at most one such mapping.)
Returns the value to which the associative array previously associated the key,
or <tt>null</tt> if the map contained no mapping for the key.
Removes the mapping for a key from the specified associative array if it is present. More formally, if the associative array contains a mapping from key <tt>k</tt> to value <tt>v</tt> such that
, that mapping is removed. (The associative array can contain at most one such mapping.)Returns the value to which the associative array previously associated the key, or <tt>null</tt> if the map contained no mapping for the key.