by Dennis Yurichev
131 followers 0 articles/week
Demographics of SAT/SMT

The following info was extracted from my web server, like I already did before for the RE4B book. It's for the year 2023. $ cat *smt*/access*2023* | grep pdf | cut -f 1 -d ' ' | sort | uniq | xargs -L 1 geoiplookup | sort | uniq -c | sort -r -n | grep -v "can't resolve hostname" 3361 GeoIP Country Edition: US, United States 1364...

Mon Feb 12, 2024 14:05
[RevEng] Demographics of reverse engineering

The following statistics was extracted from my web server log files. It's for the year 2023. Of course, it's very biased, because most webcrawlers are located in USA. Also, some countries have different policies on IPv4 allocation and more IP addresses may be allocated to users. Maybe this is the case of Singapore (relatively small country...

Mon Feb 12, 2024 14:05
[Pure C] Negative array index in practice

You know that array can be indexed with negative index: array[-1]. Here is the example, why it can be used. Search a word within a buffer, like 'java'. But on word boundary. Skip 'javascript' or 'sunjava'. const char* s="java"; size_t s_len=strlen(s); const char* x=memmem(buf, len, s, s_len); if (x!=NULL && isalpha(x[-1])==0...

Wed Jan 24, 2024 20:00
[Russian][Math] Как снять квартиру используя задачу о разборчивой невесте

И снова мне настала пора искать очередную съемную квартиру. В прошлый раз я использовал мат.анализ для поиска. На этот раз дано -- меня выгоняют из прежней квартиры через, скажем, 2 месяца, 60 дней. В крупных городах Украины, если квартира нормальная, она уйдет через несколько дней. Вернуться назад нельзя. Как найти квартиру получше? ...

Fri Jan 5, 2024 20:27
VirtualBox sudden error

I'll just leave it here for any poor soul who will google this error and land to this page. Details: code NS_ERROR_FAILURE (0x80004005), component SessionMachine, interface ISession As of VirtualBox 7.0.12. This just means your have no space on HDD/SDD. If anyone in VirtualBox team reads this, error message could be more meaningful....

Wed Jan 3, 2024 15:05
[Math] Switch to right gear on your bike using GCD (greatest common divisor)

First, about terminology: (The picture was shamelessly stolen from this website.) 'Rear' set of cogwheels called 'cassette', it has 'cogs'. 'Frontal' set of cogwheels called chainring (on crankset/chainset), also 'cogs'. Chain between them is 'chain', it has 'links'. Here is a random internet shop for bikers I googled...

Sat Dec 9, 2023 21:51

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