大约有 40,000 项符合查询结果（耗时：0.0531秒） [XML]
how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...gsql-control-structures.html, example 40-2 right at the bottom.
That's usually the easiest way. You can do some magic with rules, but it's likely going to be a lot messier. I'd recommend the wrap-in-function approach over that any day.
This works for single row, or few row, values. If you're deali...
Handling an empty UITableView. Print a friendly message
... change the height of your cell to accommodate the empty message. This is all doable but it seems like band-aid on top of band-aid.
share
|
improve this answer
|
follow
...
How do you read from stdin?
I'm trying to do some of the code golf challenges, but they all require the input to be taken from stdin . How do I get that in Python?
...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
... section B.2.1.2 escape and the introduction text of Annex B says:
... All of the language features and behaviours specified in this annex have one or more undesirable characteristics and in the absence of legacy usage would be removed from this specification. ...
... Programmers should not us...
(HTML) Download a PDF file instead of opening them in browser when clicked
... Sometimes the question is wrong. ;) Anyways, regarding your issue, that's all a UX problem. Forcing the web to behave in specific ways is sometimes necessary, but often there's better solutions from a UX perspective. Also, my answer is correct. You can not do what you want to do with HTML (which is...
What is the proper way to re-throw an exception in C#? [duplicate]
... ends on that statement and not at the real source of the exception.
Basically, it should be deemed a criminal offense to use "throw ex".
share
|
improve this answer
|
follo...
Entity Framework: One Database, Multiple DbContexts. Is this a bad idea? [closed]
...y single context in your application can do that. The trick for this is usually one additional context containing all your entities which is used only for database creation. Your real application contexts containing only subsets of your entities must have database initializer set to null.
There are...
Get notified when UITableView has finished asking for data?
...eload its data. So, when the second NSLog is fired, the table view has actually finish asking for data.
I've subclassed UITableView to send methods to the delegate before and after reloadData. It works like a charm.
share
...
Implementing IDisposable correctly
...uld have any unmanaged resources to be freed you should include Finalizer calling Dispose(false), that will allow GC to call Finalizer when doing garbage collection (in case Dispose was not called yet) and properly free unmanaged resources.
– mariozski
May 17 '...
How can I search for a multiline pattern in a file?
I needed to find all the files that contained a specific string pattern. The first solution that comes to mind is using find piped with xargs grep :
...