大约有 30,000 项符合查询结果（耗时：0.0420秒） [XML]
How do I check in SQLite whether a table exists?
...
If you are getting a "table already exists" error, make changes in the SQL string as below:
CREATE table IF NOT EXISTS table_name (para1,para2);
This way you can avoid the exceptions.
Have a reloadData for a UITableView animate when changing
...n calculations, but I had only one section and your code had an off-by-one error. I had to change the first line of your code to NSRange range = NSMakeRange(0, myTableView.numberOfSections);
– Danyal Aytekin
Jul 13 '12 at 12:41
...
Java: Get first item from a collection
...llection actually has contents. If it's empty the iterator might return an error, in which one has to check the collection size beforehand.
– spaceemotion
Nov 6 '15 at 17:05
24
...
What's the difference between %s and %d in Python string formatting?
...he text string stored in the descrip variable. The round braces prevent an error message in Python 3.
– noobninja
Aug 27 '16 at 20:51
...
How do you find out the type of an object (in Swift)?
...licitly unwrapped optionals! i.e. var myVar: SomeType!. Compiler gives the error "Cannot convert value of type 'SomeType!.Type' (aka 'ImplicitlyUnwrappedOptional<SomeType>.Type') to expected argument type 'AnyClass' (aka 'AnyObject.Type') Compiler suggest adding as! AnyClass after the type bu...
What is the difference between C, C99, ANSI C and GNU C?
...ograms according to the C standard, you should type gcc -std=c99 -pedantic-errors. Replace c99 with c11 if your GCC version supports it.
share
|
improve this answer
|
follow
...
Is there an easy way to pickle a python function (or otherwise serialize its code)?
... initialized as defaultdict(lambda : defaultdict(int)). But it returns the error ValueError: unmarshallable object. Note I'am usin python2.7. Any idea? Thanks
– user17375
May 8 '13 at 4:56
...
Modify request parameter with servlet filter
...p(), or even getAttribute() to get the request data, so, through trial and error, I determined that the servlet was calling HTTPServletRequest.getInputStream() and getQueryString(). My advice to anyone attempting this task for closed servlets is to wrap every single accessor in HTTPServletRequest in...
Changing route doesn't scroll to top in the new page
... when not using HTML5 mode in angular? Cause page reload are throwing 404 errors due to html 5 mode being active
– britztopher
Jun 8 '15 at 12:42
...
The difference between sys.stdout.write and print?
...nt (and more generally between a function and a statement).
In case of an error when evaluating arguments:
print "something", 1/0, "other" #prints only something because 1/0 raise an Exception
print("something", 1/0, "other") #doesn't print anything. The function is not called
...