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Is it possible to figure out the parameter type and return type of a lambda?
...e element of a tuple
// composed of those arguments.
};
};
// test code below:
int main()
{
auto lambda = [](int i) { return long(i*10); };
typedef function_traits<decltype(lambda)> traits;
static_assert(std::is_same<long, traits::result_type>::value, "err");
...
How to make good reproducible pandas examples
...ur code unindented:
In [2]: df
Out[2]:
A B
0 1 2
1 1 3
2 4 6
test pd.read_clipboard(sep='\s\s+') yourself.
* I really do mean small, the vast majority of example DataFrames could be fewer than 6 rowscitation needed, and I bet I can do it in 5 rows. Can you reproduce the error with df ...
Can I get JSON to load into an OrderedDict?
...onda's pkgs/main/win-64::python-3.6.4-h0c2934d_3, so this will be tough to test.
– fuglede
Feb 9 '19 at 8:48
...
Natural Sort Order in C#
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+1 Not only is it the most concise it is the fastest I have seen. except for the accepted answer but I cannot use that one because of machine dependencies. It sorted over 4 million values in about 35 seconds.
– Gene S
Oct 4 '12 at 2...
Encoding as Base64 in Java
...ss.
Here's some example code:
byte[] encodedBytes = Base64.encodeBase64("Test".getBytes());
System.out.println("encodedBytes " + new String(encodedBytes));
byte[] decodedBytes = Base64.decodeBase64(encodedBytes);
System.out.println("decodedBytes " + new String(decodedBytes));
Then read why you s...
How to detect if app is being built for device or simulator in Swift
...6_64)) && os(iOS)
...
#endif
After Swift 4.1 version
Latest use, now directly for all in one condition for all types of simulators need to apply only one condition -
#if targetEnvironment(simulator)
// your simulator code
#else
// your real device code
#endif
For more cla...
Array.push() if does not exist?
...
IMHO there's really no need to bring in a framework to test against something so simple
– DrewT
Dec 30 '15 at 18:59
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How to do URL decoding in Java?
... just the path of a URI; there is no authority, or query, etc. This can be tested by calling the respective get methods on the URI object. If you pass the decoded text to the URI constructor: new URI("https://mywebsite/do....."), then calling getPath() and other methods will give correct results.
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Check if SQL Connection is Open or Closed
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You should test if mySQLConnection.State != ConnectionState.Open && mySQLConnection.State != ConnectionState.Connecting to avoid resets with slow connections, shouldn't you?
– caligari
Apr ...
How to detect a Christmas Tree? [closed]
...n the scene, so the first threshold is just a simple monochrome brightness test; any pixels with values above 220 on a 0-255 scale (where black is 0 and white is 255) are saved to a binary black-and-white image. The second threshold tries to look for red and yellow lights, which are particularly pr...