大约有 15,572 项符合查询结果（耗时：0.0172秒） [XML]
src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
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I installed the two libraries, and still got the error. Logged off and back on, and still got the error. The make file is looking in /usr/include for libxml, but that is nested inside a libxml2 directory. Linking to libxml from /usr/include did the trick sudo ln -s libxm...
In Python, how do I indicate I'm overriding a method?
...'hello kitty!'
and if you do a faulty version it will raise an assertion error during class loading:
class ConcreteFaultyImplementer(MySuperInterface):
@overrides(MySuperInterface)
def your_method(self):
print 'bye bye!'
>> AssertionError!!!!!!!
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What is the difference between float and double?
...og(10) = 7.22 digits
This precision loss could lead to greater truncation errors being accumulated when repeated calculations are done, e.g.
float a = 1.f / 81;
float b = 0;
for (int i = 0; i < 729; ++ i)
b += a;
printf("%.7g\n", b); // prints 9.000023
while
double a = 1.0 / 81;
double b = ...
When converting a project to use ARC what does “switch case is in protected scope” mean?
...sing Xcode 4 Edit -> Refactor -> Convert to Objective-C ARC...
One of the errors I get is "switch case is in protected scope" on "some" of the switches in a switch case.
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Adding gif image in an ImageView in android
...static final int STATUS_OK = 0;
public static final int STATUS_FORMAT_ERROR = 1;
public static final int STATUS_OPEN_ERROR = 2;
protected static final int MAX_STACK_SIZE = 4096;
protected InputStream in;
protected int status;
protected int width; // full image width
pr...
Check whether a path is valid in Python without creating a file at the path's target
...en failing to reliable close or delete) 0-byte files.
Ignoring OS-specific errors differentiating between non-ignorable invalid pathnames and ignorable filesystem issues. Unsurprisingly, this is critical under Windows. (See below.)
Ignoring race conditions resulting from external processes concurren...
How to solve “The specified service has been marked for deletion” error
...Service with sc delete <service name> , and encounter the following error:
21 Answers
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Best practices: throwing exceptions from properties
...or setters they indicate that exceptions are an appropriate and acceptable error handling strategy.
For indexers, Microsoft indicates that it is acceptable for both getters and setters to throw exceptions. And in fact, many indexers in the .NET library do this. The most common exception being Argum...
surface plots in matplotlib
...our x,y,z are some arbitrary variables. In my case these were c,gamma, and errors because I was testing a support vector machine. There are many potential choices to plot the data:
scatter3D(cParams, gammas, avg_errors_array) - this works but is overly simplistic
plot_wireframe(cParams, gammas, av...
How do you clear a stringstream variable?
...The clear() member function is inherited from ios and is used to clear the error state of the stream, e.g. if a file stream has the error state set to eofbit (end-of-file), then calling clear() will set the error state back to goodbit (no error).
For clearing the contents of a stringstream, using:
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