staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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soheilhy

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

Plecra

use anyhow::*;
use futures::io::{copy, AsyncReadExt, AsyncWriteExt};
use futures::stream::StreamExt;
use log::*;
use smol::Async;

use std::net;

const PORT: u16 = 5000;

fphilipe

CREATE EXTENSION btree_gist;

CREATE TABLE room_reservations (
    room_id integer,
    reserved_at timestamptz,
    reserved_until timestamptz,
    canceled boolean DEFAULT false,
    EXCLUDE USING gist (
        room_id WITH =, tstzrange(reserved_at, reserved_until) WITH &&
    ) WHERE (not canceled)

fragsalat

use std::net::{TcpListener, SocketAddr, TcpStream, Shutdown, SocketAddrV4, Ipv4Addr};
use std::str::FromStr;
use std::thread::{spawn, JoinHandle};
use std::io::{BufReader, BufWriter, Read, Write};

fn pipe(incoming: &mut TcpStream, outgoing: &mut TcpStream) -> Result<(), String> {
    let mut buffer = [0; 1024];
    loop {
        match incoming.read(&mut buffer) {
            Ok(bytes_read) => {

hgmnz

Types of index scans

Indexes

Sequential Scan:

• Read every row in the table
• No reading of index. Reading from indexes is also expensive.

iamralch

import (
	"archive/zip"
	"io"
	"os"
	"path/filepath"
	"strings"
)

func zipit(source, target string) error {
	zipfile, err := os.Create(target)