Sean Overby soverby

Started coding in BASIC at age 12 on an Atari 1200XL in the mid-80s. From RPG IV on AS/400 to Swift on iOS, to Java, and Big Data. love to code.

soverby / HigherOrderFunctionVsBuildYourOwn

Last active May 17, 2018 11:55

	import java.util.Date;
	import java.util.function.Function;

	public class MultiParameterFunction {

	// Bad
	@FunctionalInterface
	public interface TriFunction<T, U, V, R> {
	public R customMethod(T t, U u, V v);
	}

soverby / FunctionWithCheckedException

Created May 17, 2018 11:59

	import java.util.Date;
	import java.util.Optional;

	public class FunctionWithCheckedException {

	@FunctionalInterface
	public interface SomeAppropriateSemantic<T, R> {
	public R semantic(T t) throws CustomException;
	};

soverby / FormingClosure

Last active May 17, 2018 13:13

	import java.util.ArrayList;
	import java.util.List;
	import java.util.function.Function;
	import java.util.function.Supplier;

	public class FormingClosure {

	Supplier<List<String>> supplier;

	public static void main(String[] args) {

soverby / ConsumerSupplierExample

Created May 17, 2018 15:33

	import lombok.Data;

	import java.util.HashMap;
	import java.util.Map;
	import java.util.function.Consumer;
	import java.util.function.Supplier;

	public class ConsumerSupplierExample {

	public static void main(String[] args) {

soverby / TestUUID.java

Created March 13, 2019 11:52

Java UUID fromString Behavior

	package com.accolade.test;

	import java.util.UUID;

	public class TestUUID {

	public static void main(String[] args) {
	// Valid UUID
	UUID uuid1 = UUID.fromString("123e4567-e89b-12d3-a456-426655440000");
	// Not a valid UUID, UUID will left pad zeros

soverby / NullableChain.java

Last active September 28, 2020 22:45

Using Optional.ofNullable and flatMap chaining to retrieve deeply nested properties without having to write a bunch of null checks.

	package com.soverby.test;

	import org.junit.Test;
	import java.util.Optional;
	import java.util.function.Function;

	import static org.assertj.core.api.Java6Assertions.assertThat;

	public class NullableChain {