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Practical usage of setjmp and longjmp in C
...n me where exactly setjmp() and longjmp() functions can be used practically in embedded programming? I know that these are for error handling. But I'd like to know some use cases.
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Why doesn't c++ have &&= or ||= for booleans?
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all the more reason to have &&= in my opinion. =P
– Kache
Mar 21 '10 at 20:19
4
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Difference between break and continue statement
...necessary to exit a loop before the loop has finished fully iterating over all the step values. For example, looping over a list of numbers until you find a number that satisfies a certain condition. Or looping over a stream of characters from a file until a certain character is read.
In the follow...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...o, node_redis and last but not least the sample code from media fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm as root):
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bas...
Automatic Retina images for web sites
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There is a new attribute for the img tag that allows you to add a retina src attribute, namely srcset. No javascript or CSS needed, no double loading of images.
<img src="low-res.jpg" srcset="high-res.jpg 2x">
Browser Support: http://caniuse.com/#search=srcset
O...
Generate random numbers following a normal distribution in C/C++
...iform) random numbers, and by applying an formula to them, you get two normally distributed random numbers. Return one, and save the other for the next request for a random number.
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What is the best method of handling currency/money?
... price calculation.
If you insist on using integers, you will have to manually convert to and from BigDecimals everywhere, which will probably just become a pain.
As pointed out by mcl, to print the price, use:
number_to_currency(price, :unit => "€")
#=> €1,234.01
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Do you need to dispose of objects and set them to null?
... of scope (such as a static field whose value you no longer need), but overall there is usually no need to set to null.
Regarding disposing objects, I agree with @Andre. If the object is IDisposable it is a good idea to dispose it when you no longer need it, especially if the object uses unmanaged...
How do I set a column value to NULL in SQL Server Management Studio?
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I think @Zack properly answered the question but just to cover all the bases:
Update myTable set MyColumn = NULL
This would set the entire column to null as the Question Title asks.
To set a specific row on a specific column to null use:
Update myTable set MyColumn = NULL where Fi...
Can Protractor and Karma be used together?
... to add minimal Karma setup to any project with one single command npm install min-karma.
I'd like to clarify some possible misconceptions about Karma and Protractor. Karma FAQ actually does refer to Adapter for Angular's Scenario Runner, which, however, seems to be abandoned, with Protractor bei...