return the underlying value
return the underlying value
the result of function application.
Returns string formatted according to given format string.
Returns string formatted according to given format string.
Format strings are as for String.format
(@see java.lang.String.format).
return Some underlying if it hasn't been collected, otherwise None
return Some underlying if it hasn't been collected, otherwise None
A wrapper class for java.lang.ref.WeakReference The new functionality is (1) results are Option values, instead of using null. (2) There is an extractor that maps the weak reference itself into an option.