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What is a clearfix?
...uts.
It's worth noting that today, the use of floated elements for layout is getting more and more discouraged with the use of better alternatives.
display: inline-block - Better
Flexbox - Best (but limited browser support)
Flexbox is supported from Firefox 18, Chrome 21, Opera 12.10, and Inter...
What is this Javascript “require”?
...trying to get Javascript to read/write to a PostgreSQL database. I found this project on github. I was able to get the following sample code to run in node.
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Service vs IntentService in the Android platform
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Tejas Lagvankar wrote a nice post about this subject.
Below are some key differences between Service and IntentService.
When to use?
The Service can be used in tasks with no UI, but shouldn't be too long. If you need to perform long tasks, you must use threads wi...
Does the Java &= operator apply & or &&?
...ment Operators.
A compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated only once.
So a &= b; is equivalent to a = a & b;.
(In some usages, the type-casting makes a difference to the result,...
AES vs Blowfish for file encryption
I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn't have the password.
7 Answer...
The term “Context” in programming? [closed]
I have been programming for some months now and a frequently used word is "context" in classes. Like ServletContext (Java), Activity (Android), Service (Java, Android), NSManagedContext (Objective-C, iOS).
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What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...ffer overflows
Reading or writing to an object or array at an offset that is negative, or beyond the size of that object (stack/heap overflow)
Integer Overflows
Signed integer overflow
Evaluating an expression that is not mathematically defined
Left-shifting values by a negative amount (right shi...
How expensive is RTTI?
I understand that there is a resource hit from using RTTI, but how big is it? Everywhere I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed.
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What is the difference between a weak reference and an unowned reference?
...revent ARC from deallocating the referred object).
But why two keywords? This distinction has to do with the fact that Optional types are built-in the Swift language. Long story short about them: optional types offer memory safety (this works beautifully with Swift's constructor rules - which are st...
How do I iterate over a range of numbers defined by variables in Bash?
How do I iterate over a range of numbers in Bash when the range is given by a variable?
20 Answers
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