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Create an index on a huge MySQL production table without table locking
... will BLOCK while the index is being created. MySQL is really, really stupid about this (and a few other things).
Test Script:
(
for n in {1..50}; do
#(time mysql -uroot -e 'select * from website_development.users where id = 41225\G'>/dev/null) 2>&1 | grep real;
(time mysq...
How to repair a serialized string which has been corrupted by an incorrect byte count length?
...
unserialize() [function.unserialize]: Error at offset was dues to invalid serialization data due to invalid length
Quick Fix
What you can do is is recalculating the length of the elements in serialized array
You current serialized data
$data = 'a:10:{s:16:"submit_editorial";b:0;s:15:"submi...
How to write a JSON file in C#?
...t file using JSON format in C#. The brackets are important for it to be valid JSON format.
4 Answers
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error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/g
...u declared as atomic (i.e. by omitting the nonatomic keyword), yet you provide an incomplete implementation of how to synchronize access to that property.
To make that warning disappear:
If you declare a @property to be atomic then do one of the following:
use @dynamic or;
use @synthesize and k...
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...