How to find nPr (permutations) efficiently? - Stack Overflow 4 How about this: nPr = (n−1)Pr + (n−1)P (r−1) ⋅ r Rationale: nPr denotes the number of ways to choose r elements from n while noting their order and not putting them back In the above recursion I distinguish two cases Either you don't choose the n th element, in which case you'll be choosing all your r elements from a set of (n−1)
counting combinations and permutations efficiently I have some code to count permutations and combinations, and I'm trying to make it work better for large numbers I've found a better algorithm for permutations that avoids large intermediate resu
kubernetes - kubectl logs - continuously - Stack Overflow kubectl logs lt;pod-id gt; gets latest logs from my deployment - I am working on a bug and interested to know the logs at runtime - How can I get continuous stream of logs ? edit: corrected quest
What are all of the Maven Command Line Options? - Stack Overflow I'm looking for the list of options for Maven 2 2 but cannot find it If someone knows the location please post it Thank you I found the following but I don't know enough of Maven to know which a
VIN Validation RegEx - Stack Overflow 4 [A-HJ-NPR-Za-hj-npr-z\d]{2} This allows for 2 characters, composed of any digits and any letters except I, O, and Q; it properly finds the next 2 characters: bf \d{6}$ This allows for exactly 6 digits, and is the reason the regex fails; because the final 6 characters are not all digits: c45903
Meds past expiration date. . . . | Page 2 | Survivalist Forum How long can prescription medications and OTC vitamins and medications be kept before spoilage? I know it is (usually) much longer than the posted expiration date Also, under what conditions can medications be stored to maximize shelf life?