rich-97

import java.util.Scanner;

public class Factorial {
  public static int fact (int val) {
    if (val == 0)
      return 1;
    
    return val * fact(val - 1);
  }
  

rich-97

process

/* Events */

process.on('exit', function(code) {})             // Emitted when the process is about to exit
process.on('uncaughtException', function(err) {}) // Emitted when an exception bubbles all the way back to the event loop. (should not be used)

/* Properties */

rich-97

Math

/* Constantes */

Math.E       // número de Euler.
Math.PI      // número pi.
Math.SQRT2   // Raíz cuadrada de 2.
Math.SQRT1_2 // Raíz cuadrada de 1 / 2.

rich-97

nodejs -e 'require("http").createServer((req, res) => { res.end("response"); }).listen(8080);'

rich-97

require('http').createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World!\n');
}).listen(8080);

rich-97

Postgres Cheatsheet

This is a collection of the most common commands I run while administering Postgres databases. The variables shown between the open and closed tags, "<" and ">", should be replaced with a name you choose. Postgres has multiple shortcut functions, starting with a forward slash, "". Any SQL command that is not a shortcut, must end with a semicolon, ";". You can use the keyboard UP and DOWN keys to scroll the history of previous commands you've run.

Setup

installation, Ubuntu

http://www.postgresql.org/download/linux/ubuntu/ https://help.ubuntu.com/community/PostgreSQL

rich-97

$(document).ready(function () {
    var $btn = $('.btn');
    var $image = $('#img');

    function Filter (config) {
        this.target = config.target;
        this.image = config.image;
        this.filters = config.filters;
        this.support = config.support === undefined ? true : config.support;

rich-97

#!/bin/bash
 
list=${PATH//:/' '}
list=${list//\}/' '}
list=${list//\{/' '}

color () {
  if [ -z $1 ]; then
    tput setaf 1
  else

rich-97

# Fibo between 0 and 30.
len=30
arr=()

for (( i = 0; i < len; i++ )); do
  if (( i > 0 )); then
    let arr[i]="arr[i - 1] + arr[i - 2]"
  else
    let arr[i]=i
  fi

rich-97

#include "stdio.h"
#include "string.h"

int main () {
  char str[] = "hello";
  int len = strlen(str);

  for (int i = len; i >= 0; i--)
    printf("%c", str[i]);