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License: Other
Functional utilities for Java
License: Other
See matchbox for eventually matcher.
Account account = resultOfSampling(new Sampler<Account>(){
@Override
public Account takeSample() {
return repository.findBy(id);
}
@Override
public boolean isComplete(Account account) {
return account != null;
}
});
assertThat(account.getBalance(), is(300));
public static <T> T resultOfSampling(Sampler<T> sampler) {
return resultOfSampling(sampler, new Duration(200), standardSeconds(30));
}
public static <T> T resultOfSampling(Sampler<T> sampler, Duration sampleInterval, Duration sampleDuration) {
long startTime = System.currentTimeMillis();
long endTime = startTime + sampleDuration.getMillis();
T result;
while(System.currentTimeMillis() < endTime) {
result = sampler.takeSample();
if (sampler.isComplete(result)) {
break;
}
try {
Thread.sleep(sampleInterval.getMillis())
} catch (InterruptedException exception) {
throw new RuntimeException(exception);
}
}
return result;
}
public interface Sampler<T> {
T takeSample();
boolean isComplete(T sample);
}
This may be a little unwieldy.
From "THAT OTHER FUNCTIONAL LIBRARY":
"Recursively descends through nested Collections and create a flat Collection of all of the leaves."
e.g., list.reduce(Reducer<S, T> reduceFunction); => reducedList
Many of the implementations in Eagerly and Lazily should instead be on the Iterators, Iterables or Collections classes. The Eagerly and Lazily namespaces are purely facades that express intent.
Possibly.
Not sure whether this is worthwhile.
Functor
Procedure -> A functor with void return type
Function -> A functor that returns an object of a specified type
Predicate -> A functor that returns a boolean
<NullaryX>
<UnaryX>
<BinaryX>
<TernaryX>
<QuaternaryX>
<QuinaryX>
<SenaryX>
<SeptenaryX>
<OctaryX>
<NonaryX>
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