leo-aa88

Uma introdução fácil a goroutines

Se você está começando a programar em Go, provavelmente já ouviu falar de goroutines. Mas o que são elas e como funcionam? Neste artigo, vamos explorar esse conceito fundamental da linguagem de forma simples e prática.

Começando com o básico

Vamos começar com um exemplo simples:

package main

leo-aa88

Two Sum Problem – O(N²) vs. O(N) Using HashMap

The Two Sum problem is a classic example where a brute-force solution runs in O(N²), but we can optimize it to O(N) using a hashmap.

1. JavaScript Implementation

Brute-Force Solution (O(N²))

function twoSumBruteForce(arr, target) {
    for (let i = 0; i < arr.length; i++) {

leo-aa88

Guide to Connecting to a Bluetooth Device using bluetoothctl

This guide walks you through the process of connecting to a Bluetooth device on a Linux system using the bluetoothctl command-line tool. It covers initial setup, scanning, pairing, and connecting procedures, along with troubleshooting tips.

Prerequisites

• A Linux distribution with Bluetooth support (e.g., Arch Linux).
• The bluez package installed, which provides bluetoothctl and related utilities.
• A working Bluetooth adapter installed on your system.
• Sudo privileges to execute commands that require root access.

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leo-aa88

exa --tree -I vendor .

leo-aa88

#!/bin/bash

sudo pacman -S docker
systemctl start docker.service
sudo docker info
sudo usermod -aG docker $USER
docker run hello-world

leo-aa88

#include <iostream>
#include <cassert>
#include <functional>
#include <algorithm>

class Callable {
public:
	int operator()(int x) { return x + 1; };
};

leo-aa88

import numpy as np
import matplotlib.pyplot as plt

# Define the implicit function for the heart shape
def heart_shape(x, y):
    return (x**2 + y**2 - 1)**3 - x**2 * y**3

# Create a grid of x, y points
x = np.linspace(-1.5, 1.5, 400)
y = np.linspace(-1.5, 1.5, 400)

leo-aa88

import matplotlib
import pandas as pd
from scipy.stats import pearsonr
from sklearn.preprocessing import MinMaxScaler

matplotlib.use('Qt5Agg')  # Or another interactive backend such as 'Qt5Agg', 'GTK3Agg', etc.

import matplotlib.pyplot as plt

# Create a time index

leo-aa88

# Fitting a Gumbel distribution using scipy's built-in functions for simplicity and stability
from scipy.stats import gumbel_r

# Provided water heights including the latest years up to 2024
water_heights = [
    2.60, 1.48, 0.98, 1.99, 1.45, 1.51, 2.50, 1.53, 2.00, 1.69, 1.52, 1.34, 2.05, 2.13, 1.19,
    2.60, 1.91, 1.78, 0.98, 1.49, 2.21, 1.60, 1.58, 1.68, 1.75, 1.61, 1.31, 2.60, 1.56, 3.20,
    2.05, 2.35, 1.70, 1.84, 1.34, 1.70, 1.64, 3.24, 2.51, 1.43, 1.60, 2.24, 4.75, 2.33, 1.60,
    1.90, 1.26, 1.55, 1.67, 1.68, 1.71, 1.91, 2.10, 2.06, 2.52, 2.91, 1.80, 2.32, 2.08, 2.00,
    1.99, 1.77, 2.16, 1.25, 2.67, 1.73, 2.72, 2.61, 3.13, 1.18, 1.36, 1.71, 1.72, 2.21, 1.93,