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How does '20 seconds' work in Scala?
...0.seconds()*.
Second, an "implicit conversion" is applied. Since 20 is an Int and Int has no seconds method, the compiler searches for an implicit conversion that takes an Int and returns something that does have a seconds method, with the search constrained by the scope of your method call.
You h...
Nullable type issue with ?: Conditional Operator
...nch of times already. The compiler is telling you that it doesn't know how convert null into a DateTime.
The solution is simple:
DateTime? foo;
foo = true ? (DateTime?)null : new DateTime(0);
Note that Nullable<DateTime> can be written DateTime? which will save you a bunch of typing.
...
Do you need to dispose of objects and set them to null?
...s Dispose() needs to implement any logic? Does it have to do something? Or internally when Dispose() is called signals GC that is good to go? I checked the source code for the TextWriter for example and Dispose has no implementation.
– Mihail Georgescu
Jan 27...
Checking if an Android application is running in the background
...e decision about what the "next" activity to go to is always done at the point where the switch is to happen, and it is not until that exact point (where the activity state is briefly locked down to do the switch) that we actually know for sure what the next thing will be.
And the implementatio...
Difference between Math.Floor() and Math.Truncate()
... Here's the reference.
For completeness, Math.Round rounds to the nearest integer. If the number is exactly midway between two integers, then it rounds towards the even one. Reference.
See also: Pax Diablo's answer. Highly recommended!
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TextView.setTextSize behaves abnormally - How to set text size of textview dynamically for different
...
The difference here is that in the setTextSize(int size) method, the unit type by default is "sp" or "scaled pixels". This value will be a different pixel dimension for each screen density (ldpi, mdpi, hdpi).
getTextSize(), on the other hand, returns the actual pixel di...
Strip Leading and Trailing Spaces From Java String
...his string, with all leading
* and trailing {@link Character#isWhitespace(int) white space}
* removed.
* <p>
* If this {@code String} object represents an empty string,
* or if all code points in this string are
* {@link Character#isWhitespace(int) white space}, then an empty string
* i...
What happens if I define a 0-size array in C/C++?
Just curious, what actually happens if I define a zero-length array int array[0]; in code? GCC doesn't complain at all.
7...
Why does Popen.communicate() return b'hi\n' instead of 'hi'?
...ing of the bytes you received from the subprocess, you can use decode() to convert them into a printable str:
>>> print(b'hi\n'.decode('ascii'))
hi
Of course, this specific example only works if you actually are receiving ASCII from the subprocess. If it's not ASCII, you'll get an excep...
Save and load MemoryStream to/from a file
I am serializing an structure into a MemoryStream and I want to save and load the serialized structure.
9 Answers
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