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How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
...ence between == and ===
The difference between the loosely == equal operator and the strict === identical operator is exactly explained in the manual:
Comparison Operators
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Is there any downside for using a leading double slash to inherit the protocol in a URL? i.e. src=“/
...es from an external domain and I need it to load from https:// from secure order pages and http:// from other pages, based on the current URL. I found that starting the URL with a double slash inherits the current protocol. Do all browsers support this technique?
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Using margin:auto to vertically-align a div
So I know we can center a div horizontally if we use margin:0 auto; . Should margin:auto auto; work how I think it should work? Centering it vertically as well?
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Internal typedefs in C++ - good style or bad style?
...s much as possible, and use of classes is the best way to do this in C++. For example, the C++ Standard library makes heavy use of typedefs within classes.
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Why does integer overflow on x86 with GCC cause an infinite loop?
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When the standard says it's undefined behavior, it means it. Anything can happen. "Anything" includes "usually integers wrap around, but on occasion weird stuff happens".
Yes, on x86 CPUs, integers usually wrap the way you expect. This is one of those exceptions. The ...
Tables instead of DIVs [duplicate]
...hole "Tables vs Divs" thing just barely misses the mark. It's not "table" or "div". It's about using semantic html.
Even the div tag plays only a small part in a well laid out page. Don't overuse it. You shouldn't need that many if you put your html together correctly. Things like lists, field...
What is the difference between Caching and Memoization?
... I see it, both involve avoiding repeated function calls to get data by storing it .
5 Answers
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Best way to define private methods for a class in Objective-C
...(meaning Mac OS X Leopard, iPhone OS 2.0, and later) you can create a category with an empty name (i.e. @interface MyClass ()) called Class Extension. What's unique about a class extension is that the method implementations must go in the same @implementation MyClass as the public methods. So I stru...
Why do we need the “finally” clause in Python?
...akes a difference if you return early:
try:
run_code1()
except TypeError:
run_code2()
return None # The finally block is run before the method returns
finally:
other_code()
Compare to this:
try:
run_code1()
except TypeError:
run_code2()
return None
other_code() ...
How to center a Window in Java?
What's the easiest way to centre a java.awt.Window , such as a JFrame or a JDialog ?
16 Answers
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