大约有 31,400 项符合查询结果（耗时：0.0409秒） [XML]
What is a unix command for deleting the first N characters of a line?
... do you have any idea of why the pipe doesn't work? when i run essentially that command, 'cut' doesn't print the results to stdout ... if i just run 'tail -f logfile | cut -c 5-' i can see the results ... the problem must be with grep i'm using cygwin FYI thanks
– les2
...
Python try…except comma vs 'as' in except
...s not required, since you don't have to specify it if you don't need it at all.
– mercator
Apr 13 '15 at 13:20
add a comment
|
...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
...
User.select(:first,:email).group(:first,:email).having("count(*) > 1").all
(note: not tested, you may need to tweak it)
EDITED to remove id column
share
|
improve this answer
|
...
How to apply unmerged upstream pull requests from other forks into my fork?
...
You can do it manually quite easily:
add the other fork as a remote of your repo:
git remote add otherfork git://github.com/request-author/project.git
fetch his repo's commits
git fetch otherfork
You have then two options to apply the ...
Parsing XML with namespace in Python via 'ElementTree'
...tTree is not too smart about namespaces. You need to give the .find(), findall() and iterfind() methods an explicit namespace dictionary. This is not documented very well:
namespaces = {'owl': 'http://www.w3.org/2002/07/owl#'} # add more as needed
root.findall('owl:Class', namespaces)
Prefixes a...
How do I use JDK 7 on Mac OSX?
...t to the
default 1.6.0 one
In Eclipse > Preferences > Java > Installed JREs you add a new one, of type MacOS X VM, and set the home as /Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home and
name Java SE 7 (OpenJDK)
Click Finish
Set the added JRE as default
that should be it :)
...
What's the status of multicore programming in Haskell?
...012 period, the following things have happened:
2012:
From 2012, the parallel Haskell status updates began appearing in the Parallel Haskell Digest.
2011:
Parallel and Concurrent Programming in Haskell, a tutorial. version 1.1 released by Simon Marlow
Haskell and parallelism, mentioned in an ...
What is javax.inject.Named annotation supposed to be used for?
...
So @Named really is @Qualifier, so why is @Qualifier required to be so generic, is the idea to allow someone using javax.inject to define stereotypes like @Repository,@Service,@Controller that are marked up as @Qualifier?
...
How can I group data with an Angular filter?
...DATE: jsbin Remember the basic requirements to use angular.filter, specifically note you must add it to your module's dependencies:
(1) You can install angular-filter using 4 different methods:
clone & build this repository
via Bower: by running $ bower install angular-filter from ...
ASP.NET MVC 404 Error Handling [duplicate]
... Nice! :) ErrorsController could inherit from the same base as all other controllers and thus have access to a certain functionality. Moreover, Error404 view could be wrapped in master providing the user with overall look and feel of the rest of the site without any extra work.
...