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remove_by_index STL function to remove items from a STL collection by index
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template <class _FwdIt, class _FwdIt2> | |
_FwdIt remove_by_index(_FwdIt first, | |
_FwdIt last, | |
_FwdIt2 sortedIndexFirst, | |
_FwdIt2 sortedIndexLast) | |
{ | |
_FwdIt copyFrom = first; | |
_FwdIt copyTo = first; | |
_FwdIt2 currentIndex = sortedIndexFirst; | |
size_t index = 0; | |
for (; copyFrom != last; ++copyFrom, ++index) | |
{ | |
if (currentIndex != sortedIndexLast && | |
index == *currentIndex) | |
{ | |
// Should not delete this item, so don't increment copyTo | |
++currentIndex; | |
} | |
else | |
{ | |
// Copy the values if we're at different locations | |
if (copyFrom != copyTo) | |
*copyTo = *copyFrom; | |
++copyTo; | |
} | |
} | |
return copyTo; | |
} |
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#include <vector> | |
#include <algorithm> | |
#include <functional> | |
int _tmain(int argc, _TCHAR* argv[]) | |
{ | |
std::vector<int> myVector; | |
for (int i = 0; i < 10; ++i) | |
myVector.push_back(i * 10); | |
std::vector<size_t> deleteIndex; | |
deleteIndex.push_back(3); | |
deleteIndex.push_back(6); | |
myVector.erase( | |
remove_by_index(myVector.begin(), myVector.end(), deleteIndex.begin(), deleteIndex.end()), | |
myVector.end()); | |
for (std::vector<int>::iterator it = myVector.begin(); | |
it != myVector.end(); ++it) | |
{ | |
_tprintf(_T("%d "), *it); | |
} | |
return 0; | |
} |
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