大约有 13,000 项符合查询结果(耗时:0.0361秒) [XML]

https://stackoverflow.com/ques... 

pandas: How do I split text in a column into multiple rows?

...tblocks').tolist()) #group by all but one column ['Seatblocks'] #select the column to be split .apply(split_series,sep=' ') # split 'Seatblocks' in each group .reset_index(drop=True,level=-1).reset_index()) #remove extra index created print(df2) CustNum CustomerN...
https://stackoverflow.com/ques... 

Code First: Independent associations vs. Foreign key associations?

...r = new Order { Id = 1, Customer = db.Customers.Find(1) }; Or you can use Select method to load the customer from db context. This works with independent association. – tala9999 Jan 28 '16 at 15:05 ...
https://stackoverflow.com/ques... 

The quest for the Excel custom function tooltip

...{ return v1 + v2; } we get both the function description and when selecting the function, we get argument help That looks nice, but it's all still very flaky, only works on my machine and sometimes crashes Excel. It might be a start, though... Update 9 May 2014: I've made some progre...
https://stackoverflow.com/ques... 

General suggestions for debugging in R

...neRestart(expr, restarts[[1]]) 7: doWithOneRestart(return(expr), restart) Selection: You can then step into any of those frames to see what was happening when the warning was thrown. To reset the above options to their default, enter options(error = NULL, warn = 0) As for the specific warning...
https://stackoverflow.com/ques... 

What's the best way of structuring data on firebase?

...data and a SQL environment is querying data. There's no simple way to say "SELECT USERS WHERE X = Y", because of the real-time nature of the data (it's constantly changing, sharding, reconciling, etc, which requires a simpler internal model to keep the synchronized clients in check) A simple exampl...
https://stackoverflow.com/ques... 

How to get users to read error messages?

...another extremely vital point as well! Allow the end-user to be able to select/copy the error message so that they can if they do so wish, to email to the help support team or development team. Edit#2: My bad! Whoops, thanks to DanM who mentioned that about the car, I got the name mixed up, it...
https://stackoverflow.com/ques... 

Detect if the app was launched/opened from a push notification

...e case where you have your app in the foreground, lock the phone, and then select a push notification from the lock screen, it is calling didReceiveRemoteNotification:background just before calling applicationWillEnterForeground rather than what we are seeing on iOS 10 where it calls applicationWill...
https://stackoverflow.com/ques... 

WPF Application that only has a tray icon

... +1, this should be the selected answer for the explanation alone. – ToastyMallows Aug 1 '13 at 22:26 2 ...
https://stackoverflow.com/ques... 

PowerShell: Store Entire Text File Contents in Variable

...and without sub-expressions, for example: ${C:file.txt} = ${C:file.txt} | select -skip 1 I became fascinated by this notation initially because it was very difficult to find out anything about it! Even the PowerShell 2.0 specification mentions it only once showing just one line using it--but with...
https://stackoverflow.com/ques... 

How do you loop through currently loaded assemblies?

... results = type.Assembly.GetReferencedAssemblies(); return results.Select(o => o.FullName).OrderBy(o => o).ToList(); } /// <summary> /// Intent: Get assemblies currently dependent on entry assembly. Recursive. /// </summary> public static Dictionary...