The base class wouldn't be useful, since we already have a very fast permutation iterator in the Python library, but it would be easy to subclass to add in restrictions. For example, derangements would skip placing an element on its original position, while involutions would assign the the ...
Date Validation in SSIS Datepart (to get 2 digit number for the month) DB Status Unavailable in SSIS DBTYPE_I4 dead locks caused by truncate Dealing with carriage returns within flat file source fields Debug Execute SQL Task - What parameter value is passed? Debugging problem with break points...
That problem should only happen if the heap is broken in the first place - only inserted or updated elements need to be fixed (the calls to upHeap and downHeap should fix anything else that breaks as a result of them being called). So does using priorityQueue:insert to build the heap ...