permissions

问题 Here are 4 deeply related questions about F# code quotations - How do I invoke an F# code quotation? Will it be invoked in a manner less efficient than if it were just a plain old F# lambda? to what degree? Will it require run-time support for advanced reflection or code-emitting functionality (which is often absent or prohibited from embedded platforms I am targeting)? 回答1: Quotations are just data, so you can potentially "invoke" them in whatever clever way you come up with. For instance,

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . What does it mean to read, write, and execute a directory? It's intuitive on files, but I don't understand it for directories. 回答1: If you have write permission for a directory, you can create new entries (files/folders/etc). If you have read permission for a directory, you may list ls the directories contents.

问题 I'm trying to learn how to use pundit with my Rails 4 app. I have a potential use policy. The potential use table has an attribute called :user_id. I want users to be permitted to update instances if they created them. I'm trying to figure out how to get the update action to work. My current attempts are shown below. class PotentialUsePolicy < ApplicationPolicy attr_reader :user, :record def initialize(user, record) @user = user @record = record end def index? true if user.is_admin? end def

问题 I have just installed oracle 12c and then i am trying to grant user various rights. I am logged in as system and i had given rights for create user which worked. However, while granting rights for alter table it gave me error ORA-00990: missing or invalid privilege Researching on this problem brought me to another post on SO. The Comments on this post indicated that it is because i am not logged in as GLOBAL user.However i don't know how to log in as GLOBAL user. Do i have to create one ? Is

问题 Runtime permission dialog is shown in Android 6.0 or higher, so Activity.requestPermissions(...) which was added in API level 23 makes sense. But why is there another one ( ActivityCompat.requestPermissions(...) ) to be used for below Android 6.0? Does this show runtime permission request dialog in lower versions? What is the difference between Activity.requestPermissions(permissions, requestCode) and ActivityCompat.requestPermissions(activity, permissions, requestCode) Which one should I use

问题 I am coping a site for a client, I've clones the whole site on my server and it seem to work. now that I've copied the site over to his server and trying to make a payment (using paypal pro) i get a permission error: `Warning: error_log(../PayPal.log) [function.error-log]: failed to open stream: Permission denied` I've tried changing the permissions to 777 for everything and this error keep coming. I've have looked around, in google and in here i saw that it might have something to do with

问题 I want to use android in industry, I can connect to Profilic and Ftdi USB to Serial chips with slickdevlabs.com library without any problem. The application has a service and it starts on boot,connect to the usb serial port and do the other things. my problem is that the host device does not have any interaction with user, so when the android asks Allow the app "MyAPP" to access the USB device ? [checkmark]Use by default for this USB device Cancel OK there is no person to click on ok. even

问题 I`m using MediaWiki v1.19.1. My wiki works well when I use it locally. But when I access it over the network (from another computer, or a different IP), it displays the text only. There are no images. It seems like a classic skin but it`s not. The reason is that there is no layout on my wiki (other public wiki pages show ok). My wiki uses the monobook skin now, but I can see only the text on the page. I have changed the permission to 777, including on all directories ( /var/www/kj/* ), but

问题 I add a permission with name = 'can show distribute page', codename='can_show_distribute_page', contenttype='user'. I add two groups, named 'manager' and 'normal', one has the permission 'can_show_distribute_page' and one not. Now I add two users, one adds the group 'manager', the other 'normal', how to judge whether a user has the permssion can_show_distribute_page? I try to use the has_perm method, but it always returns False. 回答1: The correct way to do this is to use has_perm on the User

问题 Did anyone go through ERR_EMPTY_RESPONSE under the combination of rails + nginx + passenger? nginx error.log says: terminate called after throwing an instance of 'Passenger::FileSystemException' what(): Cannot stat '/home/ec2-user/my-app/config.ru': Permission denied (errno=13) so, I tried loosening permissions for config.ru and its containing directory by using chmod 777 config.ru chmod 777 my-app but it results in the same error message. I will appreciate any help. 回答1: You need to loosen