Recently I configured a new machine with CentOS 6.5 on board and it turned out the host command was missing. Here is a quick solution for that:

Today I watched a quite interesting hangout. It was a quick (30 min) discussion. Attendees:

• Kent Beck,
• Martin Fowler,
• David Heinemeier Hansson

A few days ago @DHH wrote a somewhat “controversial” post on his blog about TDD and, in general, presented his point of view on TDD. As a result we got a huge discussion on Twitter about TDD. Some people say that every professional should use TDD and so on. In response, the guys from ThoughtWorks organized this hangout.  

Youtube playlist (Parts from 1 to 6)

Here is a talk Uncle Bob gave in 2011 at Ruby Midwest 2011. Honestly, I come back to this talk every two months or so. I must also add that I’m a great fan of Uncle Bob (@unclebobmartin). It also contains some notes about MVC - what the true purpose of MVC is, why it was created and so on. Here it is (you need to click on Read more to load the embedded YouTube video):

Have a great day

Swedish House Mafia - Greyhound on Vimeo.

–robert

Let’s write it down.

To be honest, I don’t remember when I actually started thinking about writing down most of the solutions I found on the internet or implemented myself. I realized that from time to time I go back to solutions, code snippets or config files I created or modified to fulfill some specific requirements. It’s good if I wrote it down somewhere, put it on Gist or Pastebin, but what if I did not? Let’s say I just configured Nginx as a load balancer and, for example, after a year or so I need to make something exactly the same or at least similar. What then? I need to go through the Nginx documentation again or start searching on Google. Sure, in some cases I remember exactly how I solved a specific problem, but when it was some time ago then… This is the reason why I decided to create this simple blog. I hope it won’t evolve in any unpredictable way. You can think about this blog as my notebook. If somebody else finds my notes useful/helpful - even better. Let’s make this World better.

Have a great day.

P.S. As you probably noticed, I’m not a native speaker, so in case you find some mistakes in my posts (probably more than one), please let me know ASAP.

Our universe (in SI units):

\(\begin{align*} & \phi(x,y) = \phi \left(\sum_{i=1}^n x_ie_i, \sum_{j=1}^n y_je_j \right) = \sum_{i=1}^n \sum_{j=1}^n x_i y_j \phi(e_i, e_j) = \\ & (x_1, \ldots, x_n) \left( \begin{array}{ccc} \phi(e_1, e_1) & \cdots & \phi(e_1, e_n) \\ \vdots & \ddots & \vdots \\ \phi(e_n, e_1) & \cdots & \phi(e_n, e_n) \end{array} \right) \left( \begin{array}{c} y_1 \\ \vdots \\ y_n \end{array} \right) \end{align*}\)

def show
  @widget = Widget(params[:id])
  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @widget }
  end
end

package interfaces
import (
	"io"
	"os"
)

//PipeExample function
func PipeExample() error {
	r, w := io.Pipe()

	go func() {
		w.Write([]byte("test\n"))
		w.Close()
	}()

	if _, err := io.Copy(os.Stdout, r); err != nil {
		return err
	}
	return nil
}

package interfaces

import (
	"fmt"
	"io"
	"os"
)

// Copy data from std in to std out
func Copy(in io.ReadSeeker, out io.Writer) error {
	w := io.MultiWriter(out, os.Stdout)
	if _, err := io.Copy(w, in); err != nil {
		return err
	}
	in.Seek(0, 0)
	buf := make([]byte, 64)
	if _, err := io.CopyBuffer(w, in, buf); err != nil {
		return err
	}

	fmt.Println()
	return nil
}

–robert