大约有 43,000 项符合查询结果（耗时：0.0556秒） [XML]
rails 3.1.0 ActionView::Template::Error (application.css isn't precompiled)
... If you're going to run the above command, make sure that you're already set your environment to production mode, or prefix the command with RAILS_ENV=production
– JESii
Apr 29 '13 at 17:59
...
How to check if a user is logged in (how to properly use user.is_authenticated)?
...
The document says: Read-only attribute which is always True (as opposed to AnonymousUser.is_authenticated which is always False). This is a way to tell if the user has been authenticated. This does not imply any permissions and doesn’t check ...
hadoop No FileSystem for scheme: file
...
Only after I read this did I realize that the conf here was the Hadoop Configuration: brucebcampbell.wordpress.com/2014/12/11/…
– Sal
Nov 10 '17 at 16:03
...
Getting “Warning! PATH is not properly set up” when doing rvm use 2.0.0 --default
...e "front" of $PATH, and
.bashrc (or equivalent for your default shell) is read and interpreted line-by-line from top to bottom.
So imagine the following scenario :
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
$ [[ -s "$HOME/.rvm/scripts/rvm" ]] && source ...
How to suppress Java warnings for specific directories or files such as generated code
...
It appears that progress is still being made (reading the comments on the bug) towards a core implementation. Make sure to update the question/answer to use specific version numbers if the feature is implemented. Otherwise, future users of Eclipse may be confused.
...
How do I compare two strings in Perl?
...arison operators to help with the loose typing in the language. You should read perlop for all the different operators.
share
|
improve this answer
|
follow
|
...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
..., this completely broke the entire app. when I try to install it fails and reads.
26 Answers
...
Performing regex Queries with pymongo
...>> db.collectionname.find({'files':{'$regex':'^File'}})
It's worth reading up on the bson Regex documentation if you plan to use regex queries because there are some caveats.
share
|
improve...
How to change the type of a field?
...erator (Mongo 4.2) which in this case modifies a field.
This can be simply read as "$set" the value of "a" to "$a" converted "$toString".
What's really new here, is being able in Mongo 4.2 to reference the document itself when updating it: the new value for "a" is based on the existing value of "$a"...
What are carriage return, linefeed, and form feed?
...shift. I don't know the history of Macs using CR.) Many text editors can read files in any of these three formats and convert between them, but not all utilities can.
Form feed is a bit more interesting (even though less commonly used directly), and with the usual definition of page separator, it...