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“Undefined reference to” template class constructor [duplicate]
...n the entire compilation process, or we will get the 'undefined reference' error. (This applies to the other methods of cola<T> also.)
Understanding the problem
The problem is caused by the fact that main.cpp and cola.cpp will be compiled separately first. In main.cpp, the compiler will impl...
Debugging WebSocket in Google Chrome
... and then you can see the Frames (now called Messages) which will show you error messages etc.
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Remove Identity from a column in a table
...T ALL
COMMIT TRAN
END TRY
BEGIN CATCH
ROLLBACK TRAN
SELECT ERROR_MESSAGE ()
END CATCH
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Can scrapy be used to scrape dynamic content from websites that are using AJAX?
..._init__(self):
CrawlSpider.__init__(self)
self.verificationErrors = []
self.selenium = selenium("localhost", 4444, "*chrome", "http://www.domain.com")
self.selenium.start()
def __del__(self):
self.selenium.stop()
print self.verificationErrors
...
Relative imports in Python 3
...)[0] returns empty string. This is why there's empty string literal in the error description:
SystemError: Parent module '' not loaded, cannot perform relative import
The relevant part of the CPython's PyImport_ImportModuleLevelObject function:
if (PyDict_GetItem(interp->modules, package) == ...
How do browsers pause/change Javascript when tab or window is not active?
Background: I'm doing some user interface tests that need to detect if people are paying attention or not. But, this question is not about the page visibility API .
...
How do I address unchecked cast warnings?
... output.put(k, v);
} else {
throw new AssertionError(
"Cannot cast to HashMap<"+ keyClass.getSimpleName()
+", "+ valueClass.getSimpleName() +">"
+", value "+ value +" is not a "+ valueClass.getSimpleName()
...
How do I add a submodule to a sub-directory?
...hub.com:...> in the snipmate-snippets directory, I get the following error message:
5 Answers
...
HTML Script tag: type or language (or omit both)?
...ad>
<body/>
</html>
You will be informed of the following error:
Line 4, Column 41: required attribute "type" not specified
So if you're a fan of standards, use it. It should have no practical effect, but, when in doubt, may as well go by the spec.
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Convert RGBA PNG to RGB with PIL
...
This code was causing a error for me: tuple index out of range. I fixed this by following another question(stackoverflow.com/questions/1962795/…). I had to convert the PNG to RGBA first and then slice it: alpha = img.split()[-1] then use that on t...