The IT person's pension is

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What it was and how: the impressions of the Redmadrobot team from WWDC

Robot developers continue to wire from San Jose. And if everyone knows about the technical news of WWDC - yes, we about it wrote , this time mc_murphy vani2 bealex talk about the experience that the conference participants receive, and other issues that usually remain behind the scenes.
 
 
What it was and how: the impressions of the Redmadrobot team from WWDC
 
twitter.com/stroughtonsmith filled with information. He has already picked everything up and described how you can write UIKit-applications for macOS yourself...
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Go through NULL

Many people know and use the built-in function ISNULL (X, Y), which replaces the first argument with the second argument if it is (first) NULL. Less useful is the inverse built-in function NULLIF (X, Y), which returns NULL if the first argument is equal to the second argument. The combination of these two functions avoids the use of IF-ELSE or CASE-WHEN constructions, which makes the code more compact. If it's interesting to see a couple of examples - welcome to the cat.
 
 
 
For example, here is the code that outputs 10 random integers in the range from 1 to 3? and the nearest value to the output ...
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A wireless power system has been developed for all electronics in the human body

A wireless power system has been developed for all electronics in the human body  
 
Every year, medicine is moving forward - and offers new types of prosthesis, artificial organs and electronic devices that are implanted in the human body. Accordingly, more and more people can afford an electric "upgrade". But the main problem of implanted electronics is how to ensure a constant and stable power supply of devices built into the body?
 
 
Different variants of are considered. Extraction of energy from the environment: piezoelectric elements (vibration), ...
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Launch LAMP and hundreds of other web applications in a few clicks

Launch LAMP and hundreds of other web applications in a few clicks In last publication I told how SSHeller helps to quickly and easily deploy OpenVPN server. In the version
???
was added one more plug-in -
Docker
.
 
I want to warn you right away that if your hands are sharpened under the console, and the control of the Docker through the command line seems convenient and intuitive, you do not need to read any further, you do not need to write anything in the comments, I already know that you do not need SSHeller.
 
And who needs it?
First and foremost, web application developers, as well as anyone who easily and quickly needs to raise some kind of service, whether it's ...
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I want to become a tester

In fact, three or four years ago I really did not want to become a tester. I did not even hear about this profession and had absolutely no idea what these same testers are doing. "Do not be a programmer" and it's very cool written how programmers think. I'm not a programmer, but I begin to understand them. The profession of the tester is not the profession of a programmer, but knowing the basics of programming is simply vital. It is impossible, after all, to test cars without knowing anything about their internal arrangement, at least in general terms. In addition, using a python, you can ...
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We get acquainted with the hackerspace of Nizhny Novgorod, CARD. Part 2

We get acquainted with the hackerspace of Nizhny Novgorod, CARD. Part 2  
 
We continue the interview with the founder of the Nizhny Novgorod hackerspace CARD - Artem Poptsov (see also
? first part
).
 
 
What equipment is there? And in general, how much space?
 
Hackerspace can be divided into four main zones: installation and computer zone, computer-assembly area, presentation area and kitchen. According to the zones, the following equipment is distributed:
 
 
3D-printers: RepRap, ToyREP.
 
Computers: 3 workstations, several laptops, single-board computers (Raspberry Pi, CubieBoard)
 
Laser printer and scanner.
 
Machine tools: drilling machine, emery.
 
Hand tools: drills...
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Vacancy Market Research BA /SA

Vacancy Market Research BA /SA"Research of the vacancy market for analysts" - that was the very real task of one very real leading analyst of one big or small firm. The researcher parsed dozens of job descriptions with hh manually, spreading them over the requested skills and increasing the counter in the corresponding column of the spreadsheet.
 
I saw in this task a good field for automation and decided to try to cope with it less blood, easily and simply.
 
I was interested in the following questions, touched upon in this study:
 
 
average level of salaries of business and system analysts,
 
the most popular skills and ...
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About the future of sharing in Russia and in the world

Why is the principle "Be first, Freddie" important for startups, how to save cities from permanent traffic jams and why large companies increasingly want not to sell goods, and deliver services - the most interesting theses and thoughts in our selection. We visited the session "Schering and platforming. Technologies that expand the radius of our interaction "at the Startup Village conference and share the speakers' theses.
 
 
About the future of sharing in Russia and in the world
 
Watch the video
 
 
What services do you use for sharing, and what do you think about their future?
Why is the principle "Be first, Freddie" important for startups, how to save cities from permanent traffic jams and why large companies increasingly want not to sell goods, and deliver services - the most interesting theses and thoughts in our selection. We visited the session "Schering and platforming. Technologies that expand the radius of our interaction "at the Startup Village conference and share the speakers' theses.     Watch the video   What services do you use for sharing, and what do you think about their future? ...
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Data warehouse performance: new digits

Data warehouse performance: new digitsIn our previous post, we shared our measurements of hypervisor performance after installing patches against the vulnerabilities of Meltdown and Specter. Today it's time to talk about the performance of the data warehouse.
 
 
 
 
Thanks to the optimizations of VzKernel and its recompilation with the "Retpoline" option, we replaced the vulnerable machine code sequences and almost completely eliminated the performance problems caused by the need to protect the hypervisor from vulnerabilities in Intel processors. As a result, the decrease in productivity was reduced to 1-2%. However, against this ...
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