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How does Java handle integer underflows and overflows and how would you check for it?
... long or maybe java.math.BigInteger. The last one doesn't overflow, practically, the available JVM memory is the limit.
If you happen to be on Java8 already, then you can make use of the new Math#addExact() and Math#subtractExact() methods which will throw an ArithmeticException on overflow.
pub...
how to listen to N channels? (dynamic select statement)
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Maybe it's my incompetency, but I found this pattern really hard to work with when you are sending & receiving complex structures through the channel. Passing a shared "aggregate" channel, as Tim Allclair said, was much easier in my case.
– Bora M. Alper...
Socket.IO Authentication
I am trying to use Socket.IO in Node.js, and am trying to allow the server to give an identity to each of the Socket.IO clients. As the socket code is outside the scope of the http server code, it doesn't have easy access to the request information sent, so I'm assuming it will need to be sent up d...
How to get the number of Characters in a String?
..."), utf8.RuneCountInString("世界"))
}
Phrozen adds in the comments:
Actually you can do len() over runes by just type casting.
len([]rune("世界")) will print 2. At leats in Go 1.3.
And with CL 108985 (May 2018, for Go 1.11), len([]rune(string)) is now optimized. (Fixes issue 24923)
The compile...
What is difference between Collection.stream().forEach() and Collection.forEach()?
...at with .stream() , I can use chain operations like .filter() or use parallel stream. But what is difference between them if I need to execute small operations (for example, printing the elements of the list)?
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How to reset index in a pandas dataframe? [duplicate]
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DataFrame.reset_index is what you're looking for. If you don't want it saved as a column, then do:
df = df.reset_index(drop=True)
If you don't want to reassign:
df.reset_index(drop=True, inplace=True)
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Call to ‘set-and-coerce-property!’ has too few arguments (3; must be...
...ntor.mi ... 3-must-be-4/20690/4
又学习到了新bug的解决方法，{:8_381:}
What does the explicit keyword mean?
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The compiler is allowed to make one implicit conversion to resolve the parameters to a function. What this means is that the compiler can use constructors callable with a single parameter to convert from one type to another in order to get t...
Generate a random double in a range
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This is generally correct, but beware of its limits. If you do double rangeMax= Double.MAX_VALUE; and double rangeMin= -rangeMax; you will always get an infinite value in return. You might want to check for Double.valueOf(rangeMax-range...
Editing legend (text) labels in ggplot
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@Sathish As you can see, the title of the y-axis is smaller than the title in the x-axis. The different sizes are used to illustrate the possibilities and its consequences. Thus the code used in the answer is correct imo.
– Jaap
Oct 14 '16 ...