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JOIN queries vs multiple queries
...re JOIN queries faster than several queries? (You run your main query, and then you run many other SELECTs based on the results from your main query)
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How much is the overhead of smart pointers compared to normal pointers in C++?
... block).
If you pass a shared_pointer to a function as a value parameter then it will be at least 10 times slower then a normal call and create lots of codes in the code segment for the stack unwinding. If you pass it by reference you get an additional indirection which can be also pretty worse in...
Can every recursion be converted into iteration?
... separate the implementation from the semantics of a programming language. Then again, his non-deterministic and multiprocessing programming languages are in a league above the practicing professional programmer.
In the final analysis, many functions are just plain easier to understand, read, and w...
Aborting a stash pop in Git
...requires that all current changes be pushed into the index:
git add -u
Then invert the merge-recursive that was done by git stash apply:
git merge-recursive stash@{0}: -- $(git write-tree) stash@{0}^1
Now you will be left with just the non-stash changes. They will be in the index. You can ...
When should one use final for method parameters and local variables?
...onfigure a Save Action to automatically add these final modifiers for you. Then you get the benefits for less effort.
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linux: kill background task
...pecially. Some things don't die on Ctrl-C, so you need to Ctrl-Z them, and then kill -9 %%. One example where I found it useful is: while true; do mplayer <some unstable online radio>; date >> restarts.log; done - Ctrl-C will just get you to next loop iteration. Before I had to do ps or ...
What do I need to do to get Internet Explorer 8 to accept a self signed certificate?
...rity➞Trusted sites➞Sites.
Confirm the URL matches, and click “Add” then “Close”.
Close the “Internet Options” dialog box with either “OK” or “Cancel”.
Refresh the current page.
When told “There is a problem with this website's security certificate.”, choose “Continue to...
How to use git bisect?
... it is not.
Let's suppose that the regression was introduced in commit 4. Then the regression is not present in this revision, and we tell it to git.
$ make
$ make test
... ... ...
$ git bisect good
Bisecting: 0 revisions left to test after this (roughly 1 step)
[< ... sha ... >] 5
It will...
Why are empty strings returned in split() results?
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So, you're not using Microsoft Word as your Python IDE, then? :)
– Tim Pietzcker
Oct 8 '12 at 11:26
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The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
... used if you don't want to loose the data currently in the table. But even then, why not do a backup and then remove invalid Ids.
– Andrei Bazanov
Nov 6 '19 at 10:52
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