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Is it better to use std::memcpy() or std::copy() in terms to performance?
...owever, after my first few attempts, I got results that varied wildly from one run to the next, so I'm guessing there was some sort of OS activity going on. I decided to start over.
Same compiler settings and flags. There is only one version of MD5, and it's faster than SHA-2, so I did 3000 loops o...
How to implement a queue with three stacks?
... this link: http://www.eecs.usma.edu/webs/people/okasaki/jfp95/index.html
One of them is O(1) with three stacks BUT it uses lazy execution, which in practice creates extra intermediate data structures (closures).
Another of them is O(1) but uses SIX stacks. However, it works without lazy execution...
Insert into … values ( SELECT … FROM … )
...ondition changed to table2.country and returns number of rows greater than one? I got similar issue here: stackoverflow.com/questions/36030370/…
– vijayrana
Mar 17 '16 at 6:25
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I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
...git rebase -i <commit>^
That takes you to the commit just before the one you want to remove. The interactive editor will show you a list of all the commits back to that point. You can pick, squash, etc. In this case remove the line for the commit you want to erase and save the file. Rebase wil...
Retrieving the last record in each group - MySQL
...2.name AND m1.id < m2.id)
WHERE m2.id IS NULL;
Regarding performance, one solution or the other can be better, depending on the nature of your data. So you should test both queries and use the one that is better at performance given your database.
For example, I have a copy of the StackOverflo...
How to condense if/else into one line in Python? [duplicate]
Is there a way to compress an if / else statement to one line in Python?
I oftentimes see all sorts of shortcuts and suspect it can apply here too.
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Can you attach a UIGestureRecognizer to multiple views?
...se, for example if you want to move the tap gesture recognizer around from one view to another. That said, it's a silly limitation that the gesture recognizer cannot be used on multiple views.
– Erik van der Neut
Aug 27 '15 at 7:35
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How do I put two increment statements in a C++ 'for' loop?
...would like to increment two variables in a for -loop condition instead of one.
8 Answers
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What's the difference between HEAD^ and HEAD~ in Git?
... nonlinear: a directed acyclic graph (DAG) or tree. For a commit with only one parent, rev~ and rev^ mean the same thing. The caret selector becomes useful with merge commits because each one is the child of two or more parents — and strains language borrowed from biology.
HEAD^ means the first im...
Why would one declare a Java interface method as abstract?
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Got me. Someone somewhere must of decided it was a desirable "feature" and put it in. You know, one of those wily open-source types :)
– jdmichal
Mar 13 '09 at 5:27
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