I found implemented this code (method where this part of code is used is returning Optional<File>, this part of code had to be added for verification if values are correct and case can be saved): if (!CaseChecker.checkValues(case)) { return Optional.of(new File("FALSE")); } When I asked the person, why he is returning something like this. The… Read More Could be in Optional really anything

List<String> list = Arrays.asList("TEST1", "TEST2", "TEST3"); final String finalStr = Optional.ofNullable(list.stream() .filter(s -> s.contains("pattern:a:b:")) .map(str -> str.substring(str.lastIndexOf(‘:’) + 1)) .findFirst()) .orElse(list.stream() .filter(s -> !s.contains("pattern:c:d:")) .findFirst()) .orElseThrow(); It will work if the list contains pattern:a:b: but for above example always throw an exception if that pattern is not available. In the orElse part it doesnt even… Read More What am i doing wrong in this Java optional – orElse statement

I’am currently studying for OCP and I’m simply asking why the first optional does not increment "counter" : Integer counter = 1; Optional<Integer> optional = (Optional<Integer>) Optional.empty().orElse( Optional.of(counter +1)); System.out.println(counter); //print 1 AtomicInteger counter2 = new AtomicInteger(1); Optional<Integer> option = (Optional<Integer>) Optional.empty().orElse( Optional.of(counter2.getAndIncrement())); System.out.println(counter2); // print 2 >Solution : Because expression counter + 1 does… Read More Optional counter behaviour

I’ve just stumbled upon a warning generated by IntelliJ and I’m wondering, do I miss something or is IntelliJ just ignoring the right side of the following or clause? Example Code: Random random = new Random(); public void test(){ Optional<String> a = Optional.ofNullable(random.nextInt(10)>5?"something":null); Optional<String> b = Optional.ofNullable(random.nextInt(10)>5?"something":null); if(a.isPresent() || b.isPresent()){ log.info(a.orElse(b.get())); } } The warning… Read More Nested Optional.get generates warning when checked and chained in orElse()

I would like to pass value to specified parameters and use default value by optional parameters for the rest. A sample is made as below. Current result is ‘b23’. But I would like to obtain the result of ‘1b3’. function runThis() { test(b=’b’); } function test(a=’1′,b=’2′,c=’3′){ console.println(a+b+c); } I also try to run test({b:’b’}) and… Read More How to pass specified parameters in Javascript

I am using below experimental block module in terraform settings block to use optional function . experiments = [module_variable_optional_attrs] I want to make variable urlMaps which is list(object) as optional . When I dont give urlMaps as a input to terraform.tfvars , I am expecting it send a null vaule. But it is giving exception… Read More optional function for list(object) in terraform