vasnake

package org.apache.spark.sql.fizzbuzz.udf

import org.apache.spark.sql.api.java.UDF1
import scala.util.Try
import org.scalatest._
import flatspec._

class FizzBuzz extends UDF1[Any, String] {
  def dbg(s: => String): Unit = println(s)

vasnake

• Plain Functional Programming by Martin Odersky
• https://youtu.be/YXDm3WHZT5g
• IMPLICIT FUNCTION TYPES
• scala/scala3#1775
• https://contributors.scala-lang.org/t/implicit-function-types/219
• https://www.google.ru/search?q=implicit+function+type+vs+kleisli+arrow
• https://www.google.com/search?q=implicit+function+types+abstract+over+context
• Implicit Implications (part 3): The Future is Functional (implicitly)

vasnake

Explaining Miles's Magic

Miles Sabin recently opened a pull request fixing the infamous SI-2712. First off, this is remarkable and, if merged, will make everyone's life enormously easier. This is a bug that a lot of people hit often without even realizing it, and they just assume that either they did something wrong or the compiler is broken in some weird way. It is especially common for users of scalaz or cats.

But that's not what I wanted to write about. What I want to write about is the exact semantics of Miles's fix, because it does impose some very specific assumptions about the way that type constructors work, and understanding those assumptions is the key to getting the most of it his fix.

For starters, here is the sort of thing that SI-2712 affects:

def foo[F[_], A](fa: F[A]): String = fa.toString

vasnake

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

vasnake

/*
Есть события: (время начала, время конца, тег "в метро", айди территории, флаг "вход", флаг "выход"),
заполнены поля могут быть как угодно, очередность событий может быть любая
*/
    case class TelEventRecord(bts: Int, ets: Int,
                        transport: String,
                        zid: Int = -1,
                        enter: Boolean = false, exit: Boolean = false)
/*
Надо обработать последовательность таких событий, чтобы получить последовательность "поездок"

vasnake

// type classes example

// based on material from SICP 1.3.1 high-order procedures
// inspired by
// The Neophyte's Guide to Scala Part 12: Type Classes
// http://danielwestheide.com/blog/2013/02/06/the-neophytes-guide-to-scala-part-12-type-classes.html

// scala.math.Numeric is a type class
// that define an interface

vasnake

--- rpcserver.py.orig	2014-10-25 19:03:15.841366375 +0400
+++ rpcserver.py	2014-10-25 19:05:40.753392389 +0400
@@ -131,7 +131,8 @@
         SSL transport.
         """
         ssl_dir = deluge.configmanager.get_config_dir("ssl")
-        ctx = SSL.Context(SSL.SSLv3_METHOD)
+        ctx = SSL.Context(SSL.SSLv23_METHOD)
+        ctx.set_options(SSL.OP_NO_SSLv2 & SSL.OP_NO_SSLv3)
         ctx.use_certificate_file(os.path.join(ssl_dir, "daemon.cert"))

vasnake

#!/usr/bin/env python
# -*- mode: python; coding: utf-8 -*-
# Copyright (c) Valentin Fedulov <vasnake@gmail.com>

''' This script intended to fix some webcam software problems.
It's job can be described in three points:
    First step: find latest JPG file in SEARCH_IN folder and subfolders.
    Next step: copy that file to WRITE_TO destination.
    Last step: put a timestamp on lower right corner of the WRITE_TO image.

vasnake

#!/bin/bash
# disable_fw.sh - Reset (disable) firewall
# ---------------------------------------------------------------------------------------------------------------
# Initially Written by Vivek Gite <vivek@nixcraft.com>
# Rewrited by Valentin Fedulov <vasnake@gmail.com>
# Source: http://www.cyberciti.biz/faq/turn-on-turn-off-firewall-in-linux/
# ---------------------------------------------------------------------------------------------------------------
# You can copy / paste / redistribute this script under GPL version 2.0 or above
# =============================================================

vasnake

#!/usr/bin/env python

"""
=====================================
PEP 20 (The Zen of Python) by example
=====================================

Usage: %prog

:Author: Hunter Blanks, hblanks@artifex.org / hblanks@monetate.com