Tests if the specified array of strings contains the specified string ignoring case.
Parameters:
strings
When an element of the array is not a String object,
it is converted to a string by calling element.toString().
If an element is null, it will be treated as empty string.
If this parameter is null, the function does nothing
and return false.
str
true, if the string has been found;
false otherwise
contains(Object[] array, Object elem)