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Determine the type of an object?
Is there a simple way to determine if a variable is a list, dictionary, or something else? I am getting an object back that may be either type and I need to be able to tell the difference.
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How to serve an image using nodejs
I have a logo that is residing at the public/images/logo.gif . Here is my nodejs code.
11 Answers
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Where does the @Transactional annotation belong?
...e one that knows about units of work and use cases. It's the right answer if you have several DAOs injected into a Service that need to work together in a single transaction.
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How to sum all column values in multi-dimensional array?
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If there are n arrays?
– Muhammad Usman
Apr 16 '14 at 13:51
2
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Double exclamation points? [duplicate]
...foo".
!"foo" // Evaluates to false.
!!"foo" // Evaluates to true.
If foo.bar is passed through, then it may not be 0 but some other falsy value. See the following truth table:
Truth Table for javascript
'' == '0' // false
0 == '' // true
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Read error response body in Java
...LConnection httpConn = (HttpURLConnection)_urlConnection;
InputStream _is;
if (httpConn.getResponseCode() < HttpURLConnection.HTTP_BAD_REQUEST) {
_is = httpConn.getInputStream();
} else {
/* error from server */
_is = httpConn.getErrorStream();
}
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How to construct a std::string from a std::vector?
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With C++11, you can do std::string(v.data()) or, if your vector does not contain a '\0' at the end, std::string(v.data(), v.size()).
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#1071 - Specified key was too long; max key length is 767 bytes
...is limit has been increased to 3072 bytes.
You also have to be aware that if you set an index on a big char or varchar field which is utf8mb4 encoded, you have to divide the max index prefix length of 767 bytes (or 3072 bytes) by 4 resulting in 191. This is because the maximum length of a utf8mb4 c...
Capturing console output from a .NET application (C#)
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If you don't want the extra new line at the end, just use Console.Write instead.
– tm1
Aug 8 '16 at 11:56
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Remove last character of a StringBuilder?
... @Harish: Possibly, a tiny, tiny bit - very unlikely to be significant though.
– Jon Skeet
Oct 24 '11 at 10:14
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