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Why is “if not someobj:” better than “if someobj == None:” in Python?
...is not already one. Roughly, we are asking the object : are you meaningful or not ? This is done using the following algorithm :
If the object has a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly ...
How to create a .jar file or export jar on IntelliJ (like eclipse java archive export) [duplicate]
... create a jar file from java compiled class files. but I not found command or file, How to create a jar file (like eclipse java archive export)
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Regex to match string containing two names in any order
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Would somebody mind explaining in a bit more detail how this example works?
– bjmc
Jul 7 '14 at 21:37
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What exactly is an HTTP Entity?
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An HTTP entity is the majority of an HTTP request or response, consisting of some of the headers and the body, if present. It seems to be the entire request or response without the request or status line (although only certain header fields are cons...
Using arrays or std::vectors in C++, what's the performance gap?
In our C++ course they suggest not to use C++ arrays on new projects anymore. As far as I know Stroustroup himself suggests not to use arrays. But are there significant performance differences?
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Boolean vs boolean in Java
...e discussions around Integer vs int in Java. The default value of the former is null while in the latter it's 0 . How about Boolean vs boolean ?
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What is the most effective way for float and double comparison?
What would be the most efficient way to compare two double or two float values?
31 Answers
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What does enumerable mean?
I was directed to MDN's for..in page when it said, "for..in Iterates over the enumerable properties of an object."
8 Answ...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
I have a simple setter method for a property and null is not appropriate for this particular property. I have always been torn in this situation: should I throw an IllegalArgumentException , or a NullPointerException ? From the javadocs, both seem appropriate. Is there some kind of an understood...
Why em instead of px?
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It is wrong to say that one is a better choice than the other (or both wouldn't have been given their own purpose in the spec). It may even be worth noting that StackOverflow makes extensive use of px units. It is not the poor choice Spoike was told it was.
Definition of units
px is...