c++ Programming Glossary: sortWhy 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 is processing a sorted array faster than an unsorted array Here is a piece of C.. is processing a sorted array faster than an unsorted array Here is a piece of C code that seems very peculiar... C code that seems very peculiar. For some strange reason sorting the data miraculously speeds up the code by almost 6x #include..
http://stackoverflow.com/questions/1265039/using-std-namespace . using namespace std I am always against. It imports all sorts of names into the global namespace and can cause all sorts.. sorts of names into the global namespace and can cause all sorts of non obvious ambiguities. Here are some common identifiers.. common identifiers that are in the std namespace count sort find equal reverse. Having a local variable called count means..
What is the difference between NULL, '\0' and 0 http://stackoverflow.com/questions/1296843/what-is-the-difference-between-null-0-and-0 as address 0xDEADBEEF then it is up to the compiler to sort this mess out. As such even on this funny architecture the following..
http://stackoverflow.com/questions/1647631/c-state-machine-design nowadays but I suspect they'll all boil down to this same sort of structure. As ldog states in a comment you can avoid the..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison and the length of lines Using such a compare function to sort items in a collection. In this case using the builtin C operator..
When should I write the keyword 'inline' for a function/method? http://stackoverflow.com/questions/1759300/when-should-i-write-the-keyword-inline-for-a-function-method but don't complain if it isn't defined. The linker will sort it out and make sure all the code that tried to use some extern..
http://stackoverflow.com/questions/1761626/weighted-random-numbers picked up 3 4 chance to be picked up Does Boost have some sort of functionality for this c boost random share improve this..
How to stop C++ console application from exiting immediately? http://stackoverflow.com/questions/2529617/how-to-stop-c-console-application-from-exiting-immediately will find it useful. I've used it a lot as a quick hack of sorts when writing tests during development. At the end of your main.. from stdin thus giving you the press any key to continue sort of behavior if you actually want a press any key message you'll..
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it? http://stackoverflow.com/questions/2611246/is-for-faster-than-while-true-if-not-why-do-people-use-it it for Something to be done repeatedly I have seen this sort of thing used a lot but I think it is rather strange... Wouldn't.. guessing that as is the reason for many a programmer to resort to cryptic code this is a tiny margin faster Why and is it really..
Is it possible to program iPhone in C++ http://stackoverflow.com/questions/270455/is-it-possible-to-program-iphone-in-c c share improve this question Short answer yes sort of. You can use Objective C which you can read about at Apple..
Using arrays or std::vectors in C++, what's the performance gap? http://stackoverflow.com/questions/381621/using-arrays-or-stdvectors-in-c-whats-the-performance-gap the size and you need to delete them manually and do all sort of housekeeping. Using arrays on the stack is also discouraged..
http://stackoverflow.com/questions/4421706/operator-overloading were given in a specific order but since many users sort answers according to votes rather than the time they were given.. to overload it. The standard library 䏭 algorithms e.g. std sort and types e.g. std map will always only expect operator to be..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c .... ^ ^ x 0 x 8 int For example if you want to sort an array both of the following would work equally well std sort.. an array both of the following would work equally well std sort x 0 x n std sort x 0 x 0 n Note that it is illegal to provide.. the following would work equally well std sort x 0 x n std sort x 0 x 0 n Note that it is illegal to provide x n as the second..
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 have become entrenched. The first is to have some sort of long lived storage area where the lifetime of each byte in.. it when it is no longer needed. The second is to have some sort of short lived storage area where the lifetime of each byte..
Eclipse CDT C++11/C++0x support http://stackoverflow.com/questions/9131763/eclipse-cdt-c11-c0x-support fine. How to make Eclipse stop complaining about these sort of errors c eclipse c 11 cdt share improve this question..
Fast intersection of sets: C++ vs C# http://stackoverflow.com/questions/1060648/fast-intersection-of-sets-c-vs-c-sharp std copy set2_unsorted.begin set2_unsorted.end set2.begin Sort the data sort set1.begin set1.end sort set2.begin set2.end vector.. std copy set2_unsorted.begin set2_unsorted.end set2.begin Sort the data sort set1.begin set1.end sort set2.begin set2.end vector..
http://stackoverflow.com/questions/1135841/c-multiline-string-literal c string literals share improve this question Well ... Sort of. The easiest is to just use the fact that adjacent string..
http://stackoverflow.com/questions/1271367/radix-sort-implemented-in-c Sort implemented in C UPDATE I managed to re work my code from scratch.. vector #include math.h using namespace std void printSorted int x int length vector vector int buckets void radixSort.. int x int length vector vector int buckets void radixSort int x int length int temp int m 0 Begin Radix Sort for int i..
http://stackoverflow.com/questions/13216041/number-of-tuples can use this algorithm with time complexity O n^2 log n . Sort the N numbers using your favorite efficient sorting method... b i for int j i j length b j c i length b j b i b j Sort the sum list you can do the sorts in place if you are comfortable..
what are the fast algorithms to find duplicate elements in a collection and group them? http://stackoverflow.com/questions/1332527/what-are-the-fast-algorithms-to-find-duplicate-elements-in-a-collection-and-grou fall heavily at the front and is worst when at the end. Sort will not change the distribution but the endian. Method 3 has..
C++ sorting and keeping track of indexes http://stackoverflow.com/questions/1577475/c-sorting-and-keeping-track-of-indexes instance v 5 7 8 New problem instance v_prime 5 0 8 1 7 2 Sort the new problem instance using a comparator like typedef std..
C++ Looking for the Element with the highest occurence in an array http://stackoverflow.com/questions/16412296/c-looking-for-the-element-with-the-highest-occurence-in-an-array will pay off very soon. So here are some solution sketches Sort the array then count the ocurrences of consecutive values. It's..
What are the Complexity guarantees of the standard containers? http://stackoverflow.com/questions/181693/what-are-the-complexity-guarantees-of-the-standard-containers Simple Associative Container Pair Associative Container Sorted Associative Container Multiple Associative Container Container.. Front Back Seuqence Forward Reverse Container std set Sorted Simple Unique Associative Container Forward Container std.. Unique Associative Container Forward Container std map Sorted Pair Unique Associative Container Forward Container std multiset..
C++ templates Turing-complete? http://stackoverflow.com/questions/189172/c-templates-turing-complete the question Is this fact useful in practice Short Answer Sort of. Long Answer Yes but only if you are a template daemon. To..
Sort list using stl sort function http://stackoverflow.com/questions/2432857/sort-list-using-stl-sort-function list using stl sort function I'm trying to sort a list part.. in '__last __first' sort Result.poly.begin Result.poly.end SortDescending And here's SortDescending struct SortDescending bool.. Result.poly.end SortDescending And here's SortDescending struct SortDescending bool operator const term t1..
C++, is it possible to call a constructor directly, without new? http://stackoverflow.com/questions/2494471/c-is-it-possible-to-call-a-constructor-directly-without-new constructor placement new share improve this question Sort of. You can use placement new to run the constructor using already..
list or container O(1)-ish insertion/deletion performance, with array semantics http://stackoverflow.com/questions/3071497/list-or-container-o1-ish-insertion-deletion-performance-with-array-semantics a container with array semantics approaching O log N . Sort of defeats the purpose I could just iterate the list. I originally..
Are there any tools for tracking down bloat in C++? http://stackoverflow.com/questions/3141555/are-there-any-tools-for-tracking-down-bloat-in-c profiler share improve this question Check out Symbol Sort . I used it a while back to figure out why our installer had..
Topological Sort with Grouping http://stackoverflow.com/questions/4073119/topological-sort-with-grouping Sort with Grouping Ok so in topological sorting depending on the..
Initialize a vector array of strings http://stackoverflow.com/questions/4268886/initialize-a-vector-array-of-strings do regular arrays. c stl share improve this question Sort of class some_class static std vector std string v declaration..
Effective C++ Item 23 Prefer non-member non-friend functions to member functions http://stackoverflow.com/questions/5989734/effective-c-item-23-prefer-non-member-non-friend-functions-to-member-functions in theory suitable to be sorted efficiently by say a Quick Sort algorithm. What are the Containers in C that satisfy this the..
Class construction with initial values http://stackoverflow.com/questions/7207884/class-construction-with-initial-values cleaner foo foo char c int i exampleChar c exampleInt i Sort of things I'm thinking about are are there performance efficiency..
Find Duplicates in an array in O(N) time http://stackoverflow.com/questions/7618491/find-duplicates-in-an-array-in-on-time time Example Input 11 29 81 14 43 43 81 29 Output 29 81 43 Sorting the input and doing a linear scan to detect duplicates destroys.. destroys the order and gives the output 29 43 81. Sorting by key another array of indices 0 1 ...N 1 according to the.. Duplicates in this unlike in my previous answer of a Radix Sort will be found immediately instead of in the last iteration or..
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