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Rails :dependent => :destroy VS :dependent => :delete_all
In rails guides it's described like this:
4 Answers
4
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When to use f:viewAction / preRenderView versus PostConstruct?
...available at the moment the @PostConstruct runs. In JSF 2.0/2.1, this tag didn't exist and you have to use the preRenderView workaround.
If the backing bean is @RequestScoped, do they effectively do the exact same thing? (and so then it is up to developer choice? (@PostConstruct seems "cleaner").
...
How to get anchor text/href on click using jQuery?
Consider I have an anchor which looks like this
5 Answers
5
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Using vagrant to run virtual machines with desktop environment
...ot this working with basically three steps. The advice from askubuntu.com didn't quite work for me, so try this simplified version:
Get a basic Ubuntu image working. You should be able to boot it and vagrant ssh.
Next, enable the VirtualBox display, which is off by default. Halt the VM and uncomme...
Invalid postback or callback argument. Event validation is enabled using '
I am getting the following error when I post back a page from the client-side. I have JavaScript code that modifies an asp:ListBox on the client side.
...
Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of
...ter sitting on internal network with proxy to the internet. Here's what I did.
0. Check the maven repositiory server is up
1. Check Proxy is set up and working
First I thought it was a proxy problem, I made sure that maven settings.xml contained the proxy settings (settings.xml can exist in two p...
Increment a database field by 1
...t should do the trick.
UPDATE mytable
SET logins = logins + 1
WHERE id = 12
Insert new row, or Update if already present:
If you would like to update a previously existing row, or insert it if it doesn't already exist, you can use the REPLACE syntax or the INSERT...ON DUPLICATE KEY UPDATE ...
How do I convert a Java 8 IntStream to a List?
...e boxed method yet and it worked like a charm.
– twreid
Jan 5 '16 at 15:07
1
In Eclipse it is pos...
CSS hack大全 - 创意 - 清泛网 - 专注C/C++及内核技术
...ground-color:#f1ee18}}{} /* Safari(Chrome) 有效 */
@media all and (min-width: 0px){ .bb{background-color:#f1ee18;/*opera and Safari(Chrome) and firefox*/ background-color:#4cac70\0;}/* 仅 Opera 有效 */ }{}
.bb, x:-moz-any-link, x:default{background-color:#4eff00;/*IE7、Firefox3.5及以下...
Unfortunately MyApp has stopped. How can I solve this?
...f these is the NullPointerException.
How to solve it?
Every time an Android application crashes (or any Java application for that matter), a Stack trace is written to the console (in this case, logcat). This stack trace contains vital information for solving your problem.
Android Studio
In the...