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What is the difference between lower bound and tight bound?
With the reference of this answer , what is Theta (tight bound)?
8 Answers
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Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...sing java language,I have a method that is supposed to return an object if it is found.
36 Answers
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What does “Memory allocated at compile time” really mean?
...ler knows at compile-time the size of the array and the size of an int, so it knows the entire size of the array at compile-time. Also a global variable has static storage duration by default: it is allocated in the static memory area of the process memory space (.data/.bss section). Given that inf...
Using std Namespace
There seem to be different views on using 'using' with respect to the std namespace.
15 Answers
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Is a Java string really immutable?
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String is immutable* but this only means you cannot change it using its public API.
What you are doing here is circumventing the normal API, using reflection. The same way, you can change the values of enums, change the lookup table used in Integer autoboxing etc.
Now, the reason ...
performSelector may cause a leak because its selector is unknown
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Solution
The compiler is warning about this for a reason. It's very rare that this warning should simply be ignored, and it's easy to work around. Here's how:
if (!_controller) { return; }
SEL selector = NSSelectorFromString(@"someMethod");
IMP imp = [_controller methodForSelector:...
Manually adding a Userscript to Google Chrome
...tead of "installing" User-Scripts I found many tutorials on the web to add it manually. All of them told me to do the same steps:
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Explicitly calling return in a function or not
... Urbanek from the R core team (I believe) for recommending a user to explicitly calling return at the end of a function (his comment was deleted though):
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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
It seems that many projects slowly come upon a need to do matrix math, and fall into the trap of first building some vector classes and slowly adding in functionality until they get caught building a half-assed custom linear algebra library, and depending on it.
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Is it wrong to place the tag after the tag?
How wrong is it to place the script tag after the closing tag of the body ( </body> ). ?
8 Answers
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