readonly

问题 In the Netbeans IDE, is there a way to make a file read-only or prevent the file's contents from being edited, even though the file is part of a project as source code, a test package, or a data file? PLEASE NOTE: I know a version control system should be used for any kind of project, and I diff any file with the version control copy before committing the changes to the repository; I'm just wondering if there's a way to "lock" a file in this editor/IDE. 回答1: After further research, this

问题 I want to ship static read-only data for use in my Core Data model. The problem is that there are obviously different persistent store types and I don't know if the format of those types is supposed to be opaque or if I'm supposed to be able to construct them by hand. Right now I just have a plist and it's very small (maybe 30 entries total). Should I just write code to import the plist into my data store when the app is first installed, or is there some way I can ship a hand-constructed

问题 I am trying to define a class with a read-only property in a Python; I followed Python documentation and came up with the following code: #!/usr/bin/python class Test: def __init__(self, init_str): self._prop = init_str @property def prop(self): return self._prop t = Test("Init") print t.prop t.prop = "Re-Init" print t.prop Now when I try to execute the code though I am expecting error/exception I see it getting executed normally: $ ./python_prop_test Init Re-Init My Python version is 2.7.2.

问题 When I want to make a value type read-only outside of my class I do this: public class myClassInt { private int m_i; public int i { get { return m_i; } } public myClassInt(int i) { m_i = i; } } What can I do to make a List<T> type readonly (so they can't add/remove elements to/from it) outside of my class? Now I just declare it public: public class myClassList { public List<int> li; public myClassList() { li = new List<int>(); li.Add(1); li.Add(2); li.Add(3); } } 回答1: You can expose it

问题 The first question is: I'm developing application in c# that creates 2 log files (.txt files): one for errors and another for modifications made by users. This two files are created with log4net . The issue I see is that these files can be edited, and so altered by mistake. I would like to set these files to readonly, and that log4net still could write to them. Because if I just change the property in the file, the next log won't be written. Is there a way to do that? Also, the user of the

问题 The first question is: I'm developing application in c# that creates 2 log files (.txt files): one for errors and another for modifications made by users. This two files are created with log4net . The issue I see is that these files can be edited, and so altered by mistake. I would like to set these files to readonly, and that log4net still could write to them. Because if I just change the property in the file, the next log won't be written. Is there a way to do that? Also, the user of the

问题 I'm trying to detect if a particular filesystem is mounted read-only or read-write on Linux (Ubuntu 16.04). Using the stat module won't work because it always returns the posix permissions regardless of the actual ability to write into the directory. I'm able to accomplish this with the rather intrusive and cumbersome code below, which attempts to create a dot file. I'd appreciate a cleaner and more elegant alternative, that can also detect if the directory is not a mount point (which would

问题 I have set the readonly property of 2 datatable columns to true. List.Columns[0].ReadOnly = true; List.Columns[1].ReadOnly = true; But i only want them to be read only when user is trying to update, User can add new rows to dataGridView so i want to turn the readonly property to false when trying to add new row. i tried doing this on CellDoubleClick event of the datagrid but it wont do anything as it is to late for the beginedit to be called. if(e.RowIndex == GridView.Rows.Count-1) GridView

问题 I am setting readonly="readonly" (in other words, true) via javascript: document.getElementById("my_id").setAttribute("readonly", "readonly"); This is having the intended effect (making the field no longer editable, but its contents are submitted with the form) in FF, Safari and Chrome, but not for IE7. In IE7 I can still modify the contents of the text input field. I have tried setting ("readonly", "true") as well, which works in all three other browsers that I am testing, but which IE7 also

问题 I have a reference-type variable that is readonly , because the reference never change, only its properties. When I tried to add the volatile modifier to it the compiled warned me that it wouldn't let both modifiers apply to the same variable. But I think I need it to be volatile because I don't want to have caching problems when reading its properties. Am I missing anything? Or is the compiler wrong? Update As Martin stated in one of the comments below: Both readonly and volatile modifiers