andrebreves’s gists

andrebreves / StableValue.java

Last active February 21, 2025 15:20

A partial implementation of JEP 502: Stable Values, including a method to set and stream

	import java.util.NoSuchElementException;
	import java.util.Objects;
	import java.util.Spliterator;
	import static java.util.Spliterator.IMMUTABLE;
	import static java.util.Spliterator.ORDERED;
	import static java.util.Spliterator.SIZED;
	import static java.util.Spliterator.SUBSIZED;
	import java.util.concurrent.locks.ReentrantLock;
	import java.util.function.Consumer;
	import java.util.function.Supplier;

andrebreves / BrazilianHoliday.java

Last active January 2, 2024 13:02

Date calculations considering Brazilian Holidays

	import java.time.LocalDate;
	import static java.time.Month.APRIL;
	import static java.time.Month.DECEMBER;
	import static java.time.Month.JANUARY;
	import static java.time.Month.MAY;
	import static java.time.Month.NOVEMBER;
	import static java.time.Month.OCTOBER;
	import static java.time.Month.SEPTEMBER;
	import java.time.MonthDay;
	import java.time.Year;

andrebreves / LazyOptional.java

Last active February 14, 2025 02:13

A type following the Optional API that computes its value once and only after a "terminal operation" (like Stream).

	import java.util.Objects;
	import java.util.Optional;
	import java.util.Spliterator;
	import java.util.concurrent.locks.ReentrantLock;
	import java.util.function.Consumer;
	import java.util.function.Function;
	import java.util.function.Predicate;
	import java.util.function.Supplier;
	import java.util.stream.Stream;
	import java.util.stream.StreamSupport;

andrebreves / vpn.sh

Last active October 16, 2024 14:41

Bash script to deactivate and activate the Endpoint Security VPN on macOS

	#!/usr/bin/env bash

	get_plist_key() {
	local value
	if value="$(set -o pipefail; plutil -extract "${2}" xml1 -o - "${1}" \| grep -Ev "^<(\?\|\!\|/?plist)")"; then
	printf "%s" "${value}"
	fi
	}

	plist_status() {

andrebreves / open-keg

Last active March 26, 2022 15:20

Make homebrew keg-only formulae available inside a interactive subshell, by setting some PATH variables

	#!/usr/bin/env bash
	set -Eeuo pipefail

	# Formatting
	if [[ -t 1 && $(tput colors) -ge 8 ]]; then
	_rst_="$(tput sgr0)" ; _bol_="$(tput bold)" ; _und_="$(tput smul)"
	_red_="$(tput setaf 1)"; _grn_="$(tput setaf 2)"; _ylw_="$(tput setaf 3)"; _blu_="$(tput setaf 4)"
	else
	_rst_=""; _bol_=""; _und_=""
	_red_=""; _grn_=""; _ylw_=""; _blu_=""

andrebreves / PercentageDistribution.java

Last active November 22, 2023 16:43

Calculates correctly distributed percentages (that sums to 100%) of arrays, collections and maps of numbers.

	import java.math.BigDecimal;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.List;
	import java.util.Map;
	import java.util.Map.Entry;
	import static java.util.stream.Collectors.toMap;
	import static java.util.stream.Collectors.toUnmodifiableList;

andrebreves / Lazy.java

Last active March 3, 2020 02:59

Thread safe lazy computation of final values using lambda.

	import java.util.Objects;
	import java.util.function.Supplier;

	public class Lazy<T> {
	private volatile T value;
	private final Supplier<T> supplier;
	private volatile boolean valueComputed = false;

	private Lazy(Supplier<T> supplier) { this.supplier = Objects.requireNonNull(supplier); }

André Breves andrebreves