anyMatch(Predicate), allMatch(Predicate), noneMatch(Predicate) — Let’s take a look at some convenience methods from the Streams API: anyMatch(Predicate), allMatch(Predicate) and noneMatch(Predicate). Let’s say you wanted to check if all the numbers in a list were positive. To do so via a for loop would be: boolean isAllPositive = true; for (int i : numbers) {…

Today I ran into a somewhat interesting problem… When I first created my React App, the default page was showing just fine. Then I decided to get to work on my project and then… all I got was this blank page… What happened? So, I decided to inspect the source…

I’m sure we’ve all seen code like this: List<String> beginsWithA = words .stream() .filter(s -> !s.isEmpty() && s.charAt(0) == 'a') .toList(); But, have you ever wondered why you have to call stream()? Why couldn’t they add all those functions to the Collections API? The reason is that Collections and Streams…

Lambda expressions were added in Java 8 as syntactic sugar which removes a lot of the boilerplate code associated with creating anonymous classes. For example, let’s say we wanted to filter a list of fruit names to start with the letter ‘a’. We could code it using the following: List<String>…