大约有 15,640 项符合查询结果（耗时：0.0441秒） [XML]
Get item in the list in Scala?
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Lift is beautiful. I can avoid arrayIndexOutOfBound errors, without checking size of array..
– Naveen Sachar
Mar 27 '17 at 6:09
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Check if an apt-get package is installed and then install it if it's not on Linux
...s upon finding that the package is missing, such as simply exiting with an error code.
REQUIRED_PKG="some-package"
PKG_OK=$(dpkg-query -W --showformat='${Status}\n' $REQUIRED_PKG|grep "install ok installed")
echo Checking for $REQUIRED_PKG: $PKG_OK
if [ "" = "$PKG_OK" ]; then
echo "No $REQUIRED_P...
How can I change property names when serializing with Json.net?
...a different version of Newtonsoft.Json package. (it may not even throw any error). The DefaultContractResolver must be put in the same assembly where JsonConvert.Serialize() method is used.
– Artemious
Jan 29 '18 at 23:32
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How can I create directory tree in C++/Linux?
...eate (%d: %s): %s\n",
(int)getpid(), errno, strerror(errno), argv[i]);
exit(rc == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
}
int status;
int fail = 0;
while (wait(&status) != -1)
{
if (WEXITSTA...
What is the difference between NULL, '\0' and 0?
...nd the compiler has to produce at least one diagnostic message (warning or error) according to the C Standard.
Note that what is a null pointer in the C language. It does not matter on the underlying architecture. If the underlying architecture has a null pointer value defined as address 0xDEADBEEF...
IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
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There are many related problems with a similar error message. Check the second line of this particular stack trace. This exception is specifically related to the call to FragmentManagerImpl.popBackStackImmediate.
This method call, like popBackStack, will always fail with...
How to map calculated properties with JPA and Hibernate
...,issue_date) from document_storage)")
private String myColumn;
the errors i get when i run and display my view even before trying to display the column on mustache is something like this
java.lang.NullPointerException
at java.base/java.lang.String$CaseInsensitiveComparator.compare(Stri...
How do I get currency exchange rates via an API such as Google Finance? [closed]
...testing/demo use. If you request more then it will return 400 and give you error: "The system has detected this request as an abuse of the free service. If you need more requests, please consider using the paid service. Please check currencyconverterapi.com/pricing for more information. Thank you." ...
JPA : How to convert a native query result set to POJO class collection
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When I tried this I got an error that the class was not a known Entity. I ended up using this approach stackoverflow.com/questions/5024533/… instead of trying to use a native query.
– FGreg
Jan 30 '13 at 21:43
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What does functools.wraps do?
...sue with this that was pretty hard to trace where Django was reporting the error "object has no attribute '__name__'". Unfortunately, for class-style decorators, I don't believe that @wrap will do the job. I have instead created a base decorator class like so:
class DecBase(object):
func = No...