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How to check that a string is an int, but not a double, etc.?
PHP has an intval() function that will convert a string to an integer. However I want to check that the string is an integer beforehand, so that I can give a helpful error message to the user if it's wrong. PHP has is_int() , but that returns false for string like "2" .
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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 ...
Declaring an unsigned int in Java
...s an unsigned integer. Static methods like compareUnsigned, divideUnsigned etc have been added to the Integer class to support the arithmetic operations for unsigned integers.
Note that int variables are still signed when declared but unsigned arithmetic is now possible by using those methods in t...
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...
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 This answer is outdated since XP SP2.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
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Java EE web development, where do I start and what skills do I need? [closed]
...ou'd like to pick another, e.g. WildFly, TomEE, Payara, Liberty, WebLogic, etc. Otherwise you have to use Spring instead of Java EE. It's namely not possible to install EJB in a barebones servlet container without modifying the core engine, you'd in case of Tomcat basically be reinventing TomEE. See...
what is the difference between GROUP BY and ORDER BY in sql
...orm aggregation functions on non-grouped columns (such as SUM, COUNT, AVG, etc).
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How do I create a simple 'Hello World' module in Magento?
...VC is very different from the Ruby on Rails, Django, CodeIgniter, CakePHP, etc. MVC model that's popular with PHP developers these days. I think it's based on the Zend model, and the whole thing is very Java OOP-like. There's two controllers you need to be concerned about. The module/frontName contr...
How to connect to Mysql Server inside VirtualBox Vagrant?
...OS): sed -i 's/symbolic-links=0/symbolic-links=0\nbind-address=0.0.0.0/g' /etc/my.cnf
– ronan_mac
Jun 10 '14 at 13:54
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Make XAMPP/Apache serve file outside of htdocs [closed]
...t;
</VirtualHost>
Open your hosts file (C:\Windows\System32\drivers\etc\hosts).
Add
127.0.0.1 transitcalculator.localhost #transitCalculator
to the end of the file (before the Spybot - Search & Destroy stuff if you have that installed).
Save (You might have to save it to the desktop, c...