大约有 40,000 项符合查询结果（耗时：0.0489秒） [XML]
You can't specify target table for update in FROM clause
...iride From a relational algebra point of view, T and (SELECT * FROM T) are completely equivalent. They are the same relation. Therefore this is an arbitrary, inane restriction. More specifically, it's a workaround to coerce MySQL into doing something that it clearly can do, but for some reason it ca...
Is it possible to change the radio button icon in an android radio button group
...t;?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:state_window_focused="false"
android:drawable="@drawable/radio_hover" />
<item android:state_checked="false" ...
iPhone Debugging: How to resolve 'failed to get the task for process'?
...
add a comment
|
289
...
Best way to convert strings to symbols in hash
...h as String and as Symbols:
my_hash.with_indifferent_access
see also:
http://api.rubyonrails.org/classes/ActiveSupport/HashWithIndifferentAccess.html
Or you can use the awesome "Facets of Ruby" Gem, which contains a lot of extensions to Ruby Core and Standard Library classes.
require 'fac...
Is there a way to make text unselectable on an HTML page? [duplicate]
...e;
-webkit-user-select: none;
/*
Introduced in IE 10.
See http://ie.microsoft.com/testdrive/HTML5/msUserSelect/
*/
-ms-user-select: none;
user-select: none;
}
For IE < 10 and Opera, you will need to use the unselectable attribute of the element you wish to be unselecta...
Where can I set environment variables that crontab will use?
...ave 'cron' run a shell script that sets the environment before running the command.
Always.
# @(#)$Id: crontab,v 4.2 2007/09/17 02:41:00 jleffler Exp $
# Crontab file for Home Directory for Jonathan Leffler (JL)
#-----------------------------------------------------------------------------
#Mi...
Is there a link to GitHub for downloading a file in the latest release of a repository?
...
A few years late, but I just implemented a simple redirect to support https://github.com/USER/PROJECT/releases/latest/download/package.zip. That should redirected to the latest tagged package.zip release asset. Hope it's handy!
...
Using port number in Windows host file
...TeamViewer, I have changed the wampserver port to 8080, so the address is http://localhost:8080.
10 Answers
...
Is it possible to make anonymous inner classes in Java static?
...
No, you can't, and no, the compiler can't figure it out. This is why FindBugs always suggests changing anonymous inner classes to named static nested classes if they don't use their implicit this reference.
Edit: Tom Hawtin - tackline says that if the...
Feedback on using Google App Engine? [closed]
...
I have tried app engine for my small quake watch application
http://quakewatch.appspot.com/
My purpose was to see the capabilities of app engine, so here are the main points:
it doesn't come by default with Django, it has its own web framework which is pythonic has URL dispatcher li...