marioidival

import java.lang.Object;
import java.util.ArrayList;
// TODO: implement EPilhaVazia, EPilhaCheia
// TODO: use cap attribute
public class HelloWorld
{
  public static void main(String[] args)
  {
	  QueueArray qe = new QueueArray(5);
	  qe.push("Oi");

marioidival

Postgres push triggers

Watch a table for changes and push a notification with a payload describing the change.

Example

In the Postgres shell:

-- Create the functions

marioidival

Some Python Open Source Projects in need of some love ❤️

Flasgger

Generates a Swagger UI (live documentation page) for Flask REST APIs.

• Repo: http://github.com/rochacbruno/flasgger
• Issues: https://github.com/rochacbruno/flasgger/issues
• todo:

marioidival

Quick Tips for Fast Code on the JVM

I was talking to a coworker recently about general techniques that almost always form the core of any effort to write very fast, down-to-the-metal hot path code on the JVM, and they pointed out that there really isn't a particularly good place to go for this information. It occurred to me that, really, I had more or less picked up all of it by word of mouth and experience, and there just aren't any good reference sources on the topic. So… here's my word of mouth.

This is by no means a comprehensive gist. It's also important to understand that the techniques that I outline in here are not 100% absolute either. Performance on the JVM is an incredibly complicated subject, and while there are rules that almost always hold true, the "almost" remains very salient. Also, for many or even most applications, there will be other techniques that I'm not mentioning which will have a greater impact. JMH, Java Flight Recorder, and a good profiler are your very best friend! Mea

marioidival

Backup:
docker exec -t -u postgres your-db-container pg_dumpall -c > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

Restore:
cat your_dump.sql | docker exec -i your-db-container psql -Upostgres

marioidival

use std::env;
use std::io;
use std::io::prelude::*;
use std::fs::File;

#[derive(Debug)]
enum Error {
    Io(io::Error),
    Program(&'static str),
}

marioidival

use std::thread;
use std::sync::{Arc, RwLock};

// Represents a reference to a node.
// This makes the code less repetitive to write and easier to read.
type NodeRef<T> = Arc<RwLock<_Node<T>>>;

// The private representation of a node.
struct _Node<T> {
    inner_value: T,

marioidival

noremap hh <esc>                                                                                          
nnoremap ; :                                                                                               
nnoremap : ;                                                                                               
                                                                                                         
noremap <up> :echoerr 'use k to up'<CR>                                                                    
noremap <down> :echoerr 'use j to down'<CR>                                                                
noremap <left> :echoerr 'use h to left'<CR>                                                                
noremap <right> :echoerr 'use l to right'<CR>                                                              
                                                                                                         
inoremap <up> <ESC>:echoerr 'use k to up'<CR>            

marioidival

[
  {
    "url": "https://api.github.com/repos/rust-br/rust-book-pt-br/issues/29",
    "repository_url": "https://api.github.com/repos/rust-br/rust-book-pt-br",
    "labels_url": "https://api.github.com/repos/rust-br/rust-book-pt-br/issues/29/labels{/name}",
    "comments_url": "https://api.github.com/repos/rust-br/rust-book-pt-br/issues/29/comments",
    "events_url": "https://api.github.com/repos/rust-br/rust-book-pt-br/issues/29/events",
    "html_url": "https://github.com/rust-br/rust-book-pt-br/pull/29",
    "id": 248573241,
    "number": 29,

marioidival

Create a new language:

Lexer

1. http://stlab.cc/legacy/how-to-write-a-simple-lexical-analyzer-or-parser.html
2. http://llvm.org/docs/tutorial/LangImpl01.html

Parser

1.http://lisperator.net/pltut/parser/