The history of creating a mobile app for children that allows you to earn money with your mind. Continuation

The history of creating a mobile app for children that allows you to earn money with your mind. Continuation
 
This is the second part of the story (mixed with the story of my mistakes and their solutions) about how I (somewhere two years in my spare time) developed a mobile application (for iOS /Android) that would motivate my daughter to solve math examples. As a result, an application has been obtained that allows the child to earn money with his mind.
 
The first part is read here .
 

The plan of the second part is


 
 
On writing the code
 
About version control
 
On the voice of
 
About the icon
 
About the assembly for Android and the size of
 
About the assembly under iOS and the size of
 
On the ...[/h]
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My way: how I refused to buy a noolite lock and replaced it with my bike

My way: how I refused to buy a noolite lock and replaced it with my bike
 
 
This story began a year and a half ago, when the lighting control blocks "noolite" came into my hands (well, I got it, bought it myself, I have a weakness for various interesting glands). Then at my disposal were two blocks of SB series and MTRF-64 adapter. Blocks of this series attracted me by the fact that they can be introduced into home wiring without its substantial alteration: took out a switch and instead put the unit in, and the switch itself was hung on wires specially deduced from the block. In this configuration, the light can be controlled both from a radio channel and by a classic - a switch...
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Permit access to the web server only through CloudFlare (iptables)

Permit access to the web server only through CloudFlare (iptables)  
Cloudflare is a great thing for protecting websites from different computer rogues - the Hackers. However, if they still found out somehow the original IP of the web server on which the site is located, they will at least try to attack it by IP, bypassing the proxy. It is possible to fence redirects, send NGINX-res codes 444 when trying to go to non-existent domains, but the most ironic way out of the situation is this: open http /https traffic to the server only for the IP addresses of our security proxy.
 
useless. crimeflare.org . Well, I found out the "detective" ...
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In Russia, the popularity of pirated software

In Russia, the popularity of pirated softwareis gradually decreasing.  According to the latest data, in the period from 2016 to 2017 the popularity of pirated software in Russia decreased to the level of 201? about which reported "Vedomosti". For the specified period of time, pirated software accounted for 62% of all installations. In previous years, the percentage of installations of pirated software to licensing has only increased, but now it is a question of reducing this indicator.  Last year, the total cost of pirated software in Russia was $ 1.3 billion, which was a record for Central and Eastern Europe. This is a lot, but for some regions, for example...
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IDisposable - that your mother did not talk about releasing resources. Part 1

This is the translation of the first part of the article. The article was written in 2008. After 10 years, almost did not lose relevance.
 
The deterministic release of resources is the necessity of
 
For more than 20 years of coding experience, I sometimes developed my own languages ​​for solving problems. They ranged from simple native languages ​​to specialized regular expressions for trees. When creating languages, there are many recommendations and some simple rules should not be violated. One of them:
 
Never create a language with exceptions, in which there is no deterministic release of ...
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The only emotions that I can feel are the anger and fear of

The only emotions that I can feel are the anger and fear of  
Derek Brahney for Mosaic. Source photograph from iStock by Getty Images
 
 
Every tenth can hardly recognize their emotions. A new study suggests a significant link between our ability to feel our own body and to be aware of our feelings.
 
 
Stephen was married twice. Two weddings. Two marriage vows. But he does not have happy memories of any of the marriages. Moreover, they are not about any of its relations at all.
 
 
With his first wife, he met at 16 on nursing courses. Six years later they were married. And three years after the wedding divorced. He says that she was never the same, did ...
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Irregular tiles on the surface of procedurally-generated planets

Irregular tiles on the surface of procedurally-generated planetsHere we will consider the method of dividing the spherical surface of a procedurally-generated planet by irregular tiles, and, as a consequence, the division of the ocean and continents into separate sectors (sectors). We assume that the surface of the planet has already been given the structure of land areas with the help of some GIS and it is possible to export vector data to ESRI shapefiles or directly to the PostgreSQL database with the extension PostGIS . The very process of creating sectors is carried out by means of PostGIS.
 
are assumed. forgedmaps.com ...
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Play, but check: how the engine calculates the designer

Play, but check: how the engine calculates the designer  
 
When designing a multiplayer game, almost the most important component is the balance. The work of the game designer in this respect is similar to the work of the intelligence analyst: if he works well, no one notices anything. It is worth stumbling, and players shamelessly take advantage of the error. But the most interesting happens when, in addition to the game designer, the programmer is also mistaken
Cossacks 3 ". In the game there are different types of musketeers and other shooters of the 17th and 18th centuries, as well as the opportunity to explore technologies that reduce the time required ...
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Tunneling is version 1.0 of

Good time reading, dear users Habra!
 
In the proposed post we propose the notation of tunnel modeling, originally proposed in articles Tunneling is version 0.9 of and Transformation of Zahman's approach .
 
 
The basis of the approach is the Descartes dualism, for which a mathematical model is proposed in the form of two hyperbolic pseudospheres - abstract (above) and material (bottom) (Fig. 1).
 
 
Tunneling is version 1.0 of
 
Fig. 1 Hyperbolic pseudospheres and spherical world view
 
...
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Interview with Ilya Stenkov, the founder of the Alfatek platform

The case pushed me with Ilya Stenkov, the founder of the famous Alfateka. I considered it impossible not to take this opportunity, and asked him many questions of interest to me about this platform.
 
Friends, there is a preliminary agreement on the next conversation. Write your questions in the comments - ask personally.
 
Abstract of the interview under the cut.
 
Interview with Ilya Stenkov, the founder of the Alfatek platform  
 
 

Thank you, Ilya, for taking the time for our conversation. Why did you decide to open Alfateque?


 
 
There are two answers to this question. One long, the second short. I'll start with a short one.
 
I myself am an active user of a ...[/h]
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