evertonfraga

Ambiente de desenvolvimento para Ethereum

Este mini-guia compreende as ferramentas necessárias para executar contratos com o Mist e desenvolver Dapps utilizando uma rede local privada.

INSTALAÇÃO

1. Instalar Mist

p1nox

[core]
# The home folder for airflow, default is ~/airflow
airflow_home = /Users/p1nox/airflow

# The folder where your airflow pipelines live, most likely a
# subfolder in a code repository
dags_folder = /Users/p1nox/airflow/dags

# The folder where airflow should store its log files. This location
base_log_folder = /Users/p1nox/airflow/logs

longcao

import java.io.InputStream

import org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils
import org.apache.spark.sql.{ DataFrame, Row }

import org.postgresql.copy.CopyManager
import org.postgresql.core.BaseConnection

val jdbcUrl = s"jdbc:postgresql://..." // db credentials elided
val connectionProperties = {

darkseed

def knapsack_aux(x: (Int, Int), is: List[Int]): List[Int] = {
  for {
    w <- is.zip(is.take(x._1) ::: is.take(is.size - x._1).map(_ + x._2))
  } yield math.max(w._1, w._2)
}

def knapsack_rec(xs: List[(Int, Int)], is: List[Int]): List[List[Int]] = {
  xs match {
    case x :: xs => knapsack_aux(x, is) :: knapsack_rec(xs, knapsack_aux(x, is))
    case _ => Nil

simondobner

Locks, Blocks and Killing sessions

Find blocked and blocking sessions

select pid,
       usename,
       pg_blocking_pids(pid) as blocked_by,
       query                 as blocked_query
from pg_stat_activity

owainlewis

package io.forward.ftp

import java.io.{File, FileOutputStream, InputStream}

import org.apache.commons.net.ftp._
import scala.util.Try

final class FTP() {

  private val client = new FTPClient

jmenbo

Manually upgrade OpenSSH on OS 10.9.x

NOTE: Installation and testing was done on a clean Mavericks (OS 10.9) installation

Install Brew:

Install Homebrew prereqs:

xcode-select --install

Install Homebrew

valdergallo

# -*- coding: utf-8 -*-

from django.db import models
import uuid

ANIMALS = (('DO', 'Dog'), ('CA', 'Cat'))


class Animal(models.Model):
    tipo = models.CharField(max_length=2, choices=ANIMALS)

slowkow

How to ssh to a remote server without typing your password

Save yourself a few keystrokes. Follow the steps below:

1. Run this Bash script on your laptop:

   #!/usr/bin/env bash
   

The hostname of your remote server.

ceme

while true; do sleep 1; curl http://www.google.com; echo -e '\n\n\n\n'$(date);done