¡@
c++ Programming Glossary: itemsHow can I efficiently select a Standard Library container in C++11? http://stackoverflow.com/questions/10699265/how-can-i-efficiently-select-a-standard-library-container-in-c11 kick in when you start handling a few thousands or more of items. There are two big categories of containers Associative containers.. Question 4 Double ended If you wish to be able to remove items from both the front and back then use a deque otherwise use..
reduce the capacity of an stl vector http://stackoverflow.com/questions/1111078/reduce-the-capacity-of-an-stl-vector a new vector do a .reseve with the size and copy the items but I don't really like the extra copy operation. PS I don't..
Create registry entry to associate file extension with application in C++ http://stackoverflow.com/questions/1387769/create-registry-entry-to-associate-file-extension-with-application-in-c type properties such as icon description and context menu items including application used when the file is double clicked...
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison the length of lines Using such a compare function to sort items in a collection. In this case using the builtin C operator for..
http://stackoverflow.com/questions/1761626/weighted-random-numbers algorithm for picking an item at random where items have individual weights 1 calculate the sum of all the weights.. and is less than the sum of the weights 3 go through the items one at a time subtracting their weight from your random number.. pointers to the objects or is more than a few dozen items long basically you have to profile to know if this helps or..
How to filter items from a std::map? http://stackoverflow.com/questions/180516/how-to-filter-items-from-a-stdmap to filter items from a std map I have roughly the following code. Could this.. more efficient Perhaps using std remove_if Can you remove items from the map while traversing it Can we avoid using the temporary.. do some stuff void foo loop the actions finding expired items Actions actions BOOST_FOREACH Actions value_type action _actions..
In what cases do I use malloc vs new? http://stackoverflow.com/questions/184537/in-what-cases-do-i-use-malloc-vs-new do this when deleting an array of data This deletes all items in the array delete pBuffer The new keyword is the C way of..
Constants and compiler optimization in C++ http://stackoverflow.com/questions/212237/constants-and-compiler-optimization-in-c
Is there a max array length limit in C++? http://stackoverflow.com/questions/216259/is-there-a-max-array-length-limit-in-c constant value . Therefore a vector char may contain more items than a vector int before memory is full. The same counts for..
How can I create cartesian product of vector of vectors? http://stackoverflow.com/questions/5279051/how-can-i-create-cartesian-product-of-vector-of-vectors of vectors I've a vector of vectors say vector vector int items of different sizes like as follows 1 2 3 4 5 6 7 8 I want to.. vector using namespace std int main vector vector int items int k 0 for int i 0 i 5 i items.push_back vector int for int.. int main vector vector int items int k 0 for int i 0 i 5 i items.push_back vector int for int j 0 j 5 j items i .push_back k..
Can you remove elements from a std::list while iterating through it? http://stackoverflow.com/questions/596162/can-you-remove-elements-from-a-stdlist-while-iterating-through-it got code that looks like this for std list item iterator i items.begin i items.end i bool isActive i update if isActive items.remove.. looks like this for std list item iterator i items.begin i items.end i bool isActive i update if isActive items.remove i else.. i items.end i bool isActive i update if isActive items.remove i else other_code_involving i items.remove_if CheckItemNotActive..
http://stackoverflow.com/questions/3703658/specifying-one-type-for-all-arguments-passed-to-variadic-function-or-variadic-te the first option above convert later template typename ...Items dragon_list_t make_dragon_list Items... maidens std array Maiden.. template typename ...Items dragon_list_t make_dragon_list Items... maidens std array Maiden sizeof... Items arr maidens ..... Items... maidens std array Maiden sizeof... Items arr maidens ... here be dragons If you combine this with the..
Array of structs and new / delete http://stackoverflow.com/questions/434140/array-of-structs-and-new-delete of structs and new delete I have a struct like this class Items private struct item unsigned int a b c item items MAX_ITEMS..
Find valid assignments of integers in arrays (permutations with given order) http://stackoverflow.com/questions/4625160/find-valid-assignments-of-integers-in-arrays-permutations-with-given-order return sb.ToString class Permutor T public T Items get private set public bool ReuseBuckets get set private T emptyBucket_.. T items ReuseBuckets true faster and uses less memory Items items emptyBucket_ new T 0 buckets_ new Dictionary int Dictionary.. size out bucket bucket new T size Array.Copy Items index bucket 0 size forIndex size bucket return bucket public..
What is the difference between std::set and std::vector? http://stackoverflow.com/questions/8686725/what-is-the-difference-between-stdset-and-stdvector has exactly and only the ordering you explicitly give it. Items in a vector are where you put them. If you put them in out of..
|