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Is it good practice to use the xor operator for boolean checks? [closed]
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"What's wrong with !=" bool1 ^ bool2 ^ bool3 makes more logical sense to me than bool1 != bool2 != bool3
– BlueRaja - Danny Pflughoeft
May 5 '10 at 20:54
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Is mathematics necessary for programming? [closed]
...sic mathematical knowledge from high school or fresh year college math, no more no less, and that almost all of programming tasks can be achieved without even need for advanced math. He argued, however, that algorithms are fundamental & must-have asset for programmers.
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Does a javascript if statement with multiple conditions test all of them?
...().top <= document.documentElement.scrollTop) the second condition is a more costy calculation, the first one is just a boolean. :)
– antoni
Oct 8 '16 at 18:48
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What is the difference between atomic and critical in OpenMP?
...cal nor atomic. Approximately, addition with critical section is 200 times more expensive than simple addition, atomic addition is 25 times more expensive then simple addition.
The fastest option (not always applicable) is to give each thread its own counter and make reduce operation when you need ...
What is non-blocking or asynchronous I/O in Node.js?
...as stalled depends on your software. What most server software do is spawn more threads to cater the additional requests. This requires more memory consumed and more processing.
Asynchronous, non-blocking example
Asynchronous, non-blocking servers - like ones made in Node - only use one thread to ...
Git: How to remove file from index without deleting files from any repository
... add foo.conf again (it is possible, but requires -f/--force).
If you have more than one configuration file, you might consider ‘moving’ them all into a single directory and ignoring the whole thing (by ‘moving’ I mean changing where the program expects to find its configuration files, and g...
Sorting an ArrayList of objects using a custom sorting order
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Java - JPA - @Version annotation
... Will this prevent creating an entity being (tried to) created more than once? I mean suppose a JMS topic message triggers creation of an entity and there are multiple instances of an application listens to the message. I just want to avoid the unique constraint violation error..
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Convert NaN to 0 in javascript
...which will have the same effect as above.
If the intent was to test for more than just NaN, then you can do the same, but do a toNumber conversion first.
a = +a || 0
This uses the unary + operator to try to convert a to a number. This has the added benefit of converting things like numeric str...
Remove a symlink to a directory
...r actually worried about doing something silly, alias rm="rm -i" has saved more hides than just about anything else out there I think.
– Matthew Scharley
Aug 8 '16 at 13:11
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