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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
... of `std::string` or the user buffer
passed to `fread()`). 0xFD is used in VS 2005 (maybe
some prior versions, too), 0xFE is used in VS 2008
and later.
0xCC When the code is compiled with the /GZ optio...
Why are margin/padding percentages in CSS always calculated against width?
...ke complaining about how confusing and dumb people are in the world then spreading more confusion and stupidity. The reasoning you've provided doesn't make sense: the same argument applies to widths, yet that works just fine. All that would be needed is to set a context and direction that the hei...
ReactJS Two components communicating
...mit to manage the state outside of React, and let multiple components have read/write access to the same part of the state, without needing to know anything about the component tree.
Many implementations exists, including ImmutableJS, React-cursors and Omniscient
Edit 2016: it seems that people ag...
CSS media queries: max-width OR max-height
.... It's been a good chance to learn myself! Take the time to systematically read though and I hope it will be helpful.
Media Queries
Media queries essentially are used in web design to create device- or situation-specific browsing experiences; this is done using the @media declaration within a pa...
What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
...oad any drivers prior to JDBC 4.0 with the method Class.forName.)
Further reading (read: questions this is a dup of)
What purpose does Class.forName() serve if you don't use the return value?
How does Class.forName() work?
What does 'Class.forName("org.sqlite.JDBC");' do?
What is the purpose of 'C...
Difference between a SOAP message and a WSDL?
...he calls.
A quick search in Google will yield many sources for additional reading (previous book link now dead, to combat this will put any new recommendations in comments)
Just noting your specific questions:
Are all SOAP messages WSDL's? No, they are not the same thing at all.
Is SOAP a protoc...
What is hashCode used for? Is it unique?
...ingerprint. We can use this finger print to identify people of interest.
Read below for more details:
Think of a Hashcode as us trying to To Uniquely Identify Someone
I am a detective, on the look out for a criminal. Let us call him Mr Cruel. (He was a notorious murderer when I was a kid -- he b...
Is JavaScript's “new” keyword considered harmful?
... building this behavior into your "classes" by default. Definitely worth a read... as is his upcoming book, Secrets of the JavaScript Ninja, which finds hidden gold in this and many other "harmful" features of the JavaScript language (the chapter on with is especially enlightening for those of us wh...
Is null reference possible?
...
@Karl well in C++, "dereferencing" doesn't mean to read a value. Some people think "dereference" means to actually access or modify the stored value, but that's not true. The logic is that C++ says that an lvalue refers to "an object or function". If that is so, then the ques...
Update relationships when saving changes of EF4 POCO objects
...atic merge functionality exists in EF.
Edit 2:
As you can see this was already added to MS Connect as suggestion in 2007. MS has closed it as something to be done in next version but actually nothing had been done to improve this gap except STE.
...