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c++ Programming Glossary: justWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array runs in 1.93 seconds. Initially I thought this might be just a language or compiler anomaly. So I tried it in Java import.. next thought was how silly that is because the array was just generated. What is going on Why is a sorted array faster than.. I admit it's not the best analogy since the train could just signal the direction with a flag. But in computers the processor..
What are the rules about using an underscore in a C++ identifier? http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier m_foo . I've also seen myFoo occasionally. C# or possibly just .NET seems to recommend using just an underscore as in _foo.. C# or possibly just .NET seems to recommend using just an underscore as in _foo . Is this allowed by the C standard.. '_t' are reserved for additional type names. Personally I just don't start identifiers with underscores. New addition to my..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom the parameter argument is taken by value . While one could just as easily do the following and indeed many naive implementations..
What can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux costs are equally likely a priori. Then suppose we take just 2 stack samples and we see instruction I on both samples designated..
http://stackoverflow.com/questions/4421706/operator-overloading two of these operators actually do anything the others are just forwarding their arguments to either of these two to do the..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c case the operator yields a pointer to the entire array not just a pointer to its first element. Although in that case the values.. discernible by the small box next to x but it could just as well be the result of a function returning a pointer or any..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong iostream eof inside a loop condition considered wrong I just found a comment in this answer saying that using iostream eof..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c not that a pointer must point to the stack. A pointer is just a variable that holds a memory address. This variable is on..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords you don't need to know the meaning of a name but can just grammatically analyze the input and then create a parse tree.. that denotes an entity or label 6.6.4 6.1 An identifier is just a plain sequence of characters digits while the next two are..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope a int main int p foo cout p p 8 cout p And the code is just running with no runtime exceptions The output was 5 8 How can.. and replaced it with a wardrobe. The entire hotel could be just about to be torn down and replaced with a football stadium and.. a lot of attention. I'm not sure why I considered it to be just a fun little analogy but whatever. I thought it might be germane..
In C++ source, what is the effect of extern “C”? http://stackoverflow.com/questions/1041866/in-c-source-what-is-the-effect-of-extern-c parameter type information to the name used for linkage. Just so you know you can specify C linkage to each individual declaration..
Good C++ GUI library for Windows http://stackoverflow.com/questions/115045/good-c-gui-library-for-windows is REALLY good I will consider buying it. Cross platform . Just a wish I can live without that. Please suggest your candidates...
What is the difference between NULL, '\0' and 0 http://stackoverflow.com/questions/1296843/what-is-the-difference-between-null-0-and-0 character Don't get these confused with null pointers. Just because the bit representation is the same and this allows for..
http://stackoverflow.com/questions/1553382/is-delete-equal-to-delete
http://stackoverflow.com/questions/1610030/why-can-you-return-from-a-non-void-function-without-returning-a-value-without-pr return type is void. This warning is enabled by Wall . Just as a curiosity. Look what this code does 1 #include iostream..
http://stackoverflow.com/questions/1647631/c-state-machine-design state machines to run side by side without interference. Just create a structure type which holds the machine specific data..
Reading from text file until EOF repeats last line http://stackoverflow.com/questions/21647/reading-from-text-file-until-eof-repeats-last-line gcc . c iostream fstream share improve this question Just follow closely the chain of events. Grab 10 Grab 20 Grab 30..
When does invoking a member function on a null instance result in undefined behavior? http://stackoverflow.com/questions/2474018/when-does-invoking-a-member-function-on-a-null-instance-result-in-undefined-beha is never stated so what does it mean to use the lvalue Just even generate it at all or to use it in the more formal sense..
Which, if any, C++ compilers do tail-recursion optimization? http://stackoverflow.com/questions/34125/which-if-any-c-compilers-do-tail-recursion-optimization the compiler do the optimization is straightforward Just switch on optimization for speed. But you do that anyway right..
What can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux slow there's a simple way to find performance problems. Just halt it several times and each time look at the call stack...
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three existing class such as std string already does it for you. Just compare the simple code using a std string member to the convoluted..
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special even though the standard term is POD struct for both cases Just like in the case of aggregates it doesn't matter what static..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers . namespace pretty_print struct tuple_dummy_t Just if you want special delimiters for tuples. typedef std pair..
How does the Comma Operator work http://stackoverflow.com/questions/54142/how-does-the-comma-operator-work has exposed a nuance when using the comma operator. Just to document this a b c a is set to the value of b a b c a is..
What are the barriers to understanding pointers and what can be done to overcome them? http://stackoverflow.com/questions/5727/what-are-the-barriers-to-understanding-pointers-and-what-can-be-done-to-overcome layout h v ttttNNNNNNNNNN 1234My house Copy pointer value Just write the address on a new piece of paper. You now have two..
How to determine CPU and memory consumption from inside a process? http://stackoverflow.com/questions/63166/how-to-determine-cpu-and-memory-consumption-from-inside-a-process lastTotalSys totalIdle lastTotalIdle Overflow detection. Just skip this value. percent 1.0 else total totalUser lastTotalUser.. timeSample.tms_utime lastUserCPU Overflow detection. Just skip this value. percent 1.0 else percent timeSample.tms_stime..
What XML parser should I use in C++? http://stackoverflow.com/questions/9387610/what-xml-parser-should-i-use-in-c c xml parsing c faq share improve this question Just like with standard library containers what library you should.. in it you will have to fix them. You can still use it. Just be aware of what you're getting. LlamaXML It is an implementation.. itself TinyXPath is distributed under the zLib license. Just Get The Job Done So you don't care about XML correctness. Performance..
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