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What characters are allowed in an email address?

...822 addresses was a mere 3.7k. See also: RFC 822 Email Address Parser in PHP. The formal definitions of e-mail addresses are in: RFC 5322 (sections 3.2.3 and 3.4.1, obsoletes RFC 2822), RFC 5321, RFC 3696, RFC 6531 (permitted characters). Related: The true power of regular expressions ...
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TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes

...nts such as Polish would have slightly fewer words; Greek, Hebrew, Arabic, etc (with mostly 2-byte sequences) about half; CJK ideographs are 3 or 4-byte sequences, but I don't know how long words are. – ChrisV Feb 29 '16 at 19:05 ...
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Things possible in IntelliJ that aren't possible in Eclipse?

...ess { String getStreetAddress(); String getZipCode(); Country getCountry(); } interface Person { String getName(); Address getAddress(); int getAge(); } //--- Person p; Country c = p.<CTRL-SHIFT-SPACE> and it will silently autocomplete it to Country c = p.getAddress...
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How to Set AllowOverride all

... In case you are on Ubuntu, edit the file /etc/apache2/apache2.conf (here we have an example of /var/www): <Directory /var/www/> Options Indexes FollowSymLinks AllowOverride None Require all granted </Directory> and change it to;...
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Completely uninstall PostgreSQL 9.0.4 from Mac OSX Lion?

... removed. sudo rm -rf /Library/PostgreSQL Remove the ini file: sudo rm /etc/postgres-reg.ini Remove the PostgreSQL user using System Preferences -> Users & Groups. Unlock the settings panel by clicking on the padlock and entering your password. Select the PostgreSQL user and click on th...
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Cycles in family tree software

... has many issues, such as incompatibility with same sex relations, incest, etc... Which in real life happens more often than you'd imagine (especially when going back in time to the 1700-1800). We have modeled our family tree to what happens in the real world: Events (for example, births, weddings,...
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MVVM in WPF - How to alert ViewModel of changes in Model… or should I?

...e a card up to 21 (but dealer stays put at 17), that you can split cards, etc. I assumed it all belonged in the model class and for that reason I felt I needed a BlacJackGame controller class in the model. I'm still trying to understand this and would appreciate examples/references. The idea of ...
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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization

...e same way in C# by replacing synchronized with lock): void foo() { // etc. synchronized(someObject) { // if something throws here, the lock on someObject will // be unlocked } // etc. } ... is already using RAII: The mutex acquisition is done in the keyword (synchron...
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What is a CSRF token ? What is its importance and how does it work?

...application doesn’t distinguish between POST and GET requests (e.g. in PHP by using $_REQUEST instead of $_POST). Don’t do that! Data altering requests could be submitted as easy as <img src="http://a.com/tweet?tweet=This+is+really+bad">, embedded in a malicious website or even an ...
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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?

... In todays world, Data Execution Prevention doesn't even allow the CPU to fetch an instruction from the heap. This answer is outdated since XP SP2. – MSalters Apr 5 '17 at 8:27 2 ...