readonly

问题 I'm aware of opening files in readonly mode from shell using vim -R , but how to open a file from inside vim in a separate tab ( :tabe <filename> ) in readonly mode? Thanks for your time. 回答1: To open a file in read only mode in a new tab, use tab sview /path/to/file To open the file in the same pane, (without using a new window or tab), use view /path/to/file Note that tab view /path/to/file does not open a new tab. 回答2: You can open a file in readonly mode from inside vim : :view /path/to

问题 Is there a way to have a private readonly field in a class that could be assigned a value anywhere in the class, but only once?? That is, I am looking for a private readonly kind of field which could be assigned a value only once, but not necessarily inside the constructor. So that, if a value is re-assigned to a field then it shows compile-time error ( I am sure that is asking for too much). If there is any pattern (not language feature) that could do the same job, would really be interested

问题 Is it possible to use Hibernate and connect to a database with a read only connection? I will be working on a project that will require connecting to an existing database, pulling data from it, and doing some complex data manipulation in the application. Throughout all of this I can`t change anything in the database, hence the read only connection requirement. My first thought was to pull the data from the database using Hibernate so that I can have ready made Java objects represent the data,

问题 I need to vertically center a DataGridCheckBoxColumn . Since I did not find a Property inside DataGridCheckBoxColumn , I applied an ElementStyle . However, when this style is applied, my CheckBox becomes checkable again, although it is set to ReadOnly in my DataGrid (the whole Datagrid is ReadOnly ), and in DataGridCheckBoxColumn itself. How can I create a vertically centered CheckBox that keeps its ReadOnly state? Here is my code: <DataGrid IsReadOnly="True"> <DataGrid.Columns>

问题 I need to vertically center a DataGridCheckBoxColumn . Since I did not find a Property inside DataGridCheckBoxColumn , I applied an ElementStyle . However, when this style is applied, my CheckBox becomes checkable again, although it is set to ReadOnly in my DataGrid (the whole Datagrid is ReadOnly ), and in DataGridCheckBoxColumn itself. How can I create a vertically centered CheckBox that keeps its ReadOnly state? Here is my code: <DataGrid IsReadOnly="True"> <DataGrid.Columns>

问题 I have a Date Textbox in each row of a Grid View. As the users must not be allowed to put their own values in the text box, we have set the property as ReadOnly="true". And provided a calender java-script plug-in which sets the Textbox value. Now when I am trying to access the date Textbox on save click, the Textbox value is not persisted. I knew about this issue and resolution for this too. We need to set the readonly attribute on server side to resolve this issue. But my biggest concern

问题 Is there an easy way to open an sqlite3 database using the DB-compliant sqlite3 module in a way that is read-only? I want to access a database read-only on a file system that doesn't support locking. I know that the C api supports this, but can't figure out a way to do this with the sqlite3 interface. 回答1: As of Python 3.4.0 you can open the database in read only mode with the following: db = sqlite3.connect('file:/path/to/database?mode=ro', uri=True) 回答2: Apparently it is possible using APSW

问题 My Goal: Create a C# class for predefined errors that have both an ID and a Message. Here was what I tried: public class MyError { public static readonly MyError OK = new MyError(0, "OK"); public static readonly MyError Bad = new MyError(1, "Bad Stuff"); public MyError(int id, string message) { this.Id = id; this.Message = message; } public readonly int Id; public readonly string Message; } This compiles just fine and I am sure it would work just fine in practice. But I always like to follow

问题 If I have a POSIX system like Linux or Mac OS X, what's the best and most portable way to determine if a path is on a read-only filesystem? I can think of 4 ways off the top of my head: open(2) a file with O_WRONLY - You would need to come up with a unique filename and also pass in O_CREAT and O_EXCL . If it fails and you have an errno of EROFS then you know it's a read-only filesystem. This would have the annoying side effect of actually creating a file you didn't care about, but you could

问题 I've got the extremely unlikely and original situation of wanting to return a readonly array from my property. So far I'm only aware of one way of doing it - through the System.Collections.ObjectModel.ReadOnlyCollection<T> . But that seems somehow awkward to me, not to mention that this class loses the ability to access array elements by their index ( added: whoops, I missed the indexer ). Is there no better way? Something that could make the array itself immutable? 回答1: Use