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Can table columns with a Foreign Key be NULL?
...affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCES `parent` (`id`))
The first insert will pass because we i...
Jenkins Host key verification failed
I have a problem with jenkins , setting "git", shows the following error:
13 Answers
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JavaScript: Upload file
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(in stack overflow snippets there is problem with error handling, however in <a href="https://jsfiddle.net/Lamik/b8ed5x3y/5/">jsfiddle version</a> for 404 errors 4xx/5xx are <a href="https://stackoverflow.com/a/33355142/860099">not throwing</a> at all...
What is the instanceof operator in JavaScript?
... the Test() function.
var test = Test('test');
test.test(); // throws TypeError: Object #<Test> has no method 'test'
test // returns 'test'
Using "new" assigns the value of "this" inside the function to the declared var, while not using it assigns the return value instead.
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“tag already exists in the remote" error after recreating the git tag
I get the following error after I run the steps below:
8 Answers
8
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OpenSSL: PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE [close
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that's useful. Thanks. But in STunnel log I see the error SSL_accept: 14094418: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket when I try ro make connection
– lsv
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xd1 in position 2: ordinal not in range(128)
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The reason for the error being that Python is trying to automatically decode it from the default encoding, ASCII, so that it can then encode it as he specified, to UTF-8. Since the data isn't valid ASCII, it doesn't work.
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How to fix .pch file missing on build?
...basic answer than mine. Step 1-7 are necessary to get PCH working, but the error message from the question indicates those steps have already been done. OTOH, it assumes a single stdafx.pch file, while the xxxxx.pch from the question hints at a more complex problem (multi-PCH setup).
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java.net.SocketException: Connection reset
I am getting the following error trying to read from a socket. I'm doing a readInt() on that InputStream , and I am getting this error. Perusing the documentation this suggests that the client part of the connection closed the connection. In this scenario, I am the server.
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What is a raw type and why shouldn't we use it?
..."John");
names.add("Mary");
names.add(Boolean.FALSE); // not a compilation error!
The above code runs just fine, but suppose you also have the following:
for (Object o : names) {
String name = (String) o;
System.out.println(name);
} // throws ClassCastException!
// java.lang.Boolean ca...