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What's the state of the art in email validation for Rails?
...r complex†) EmailValidator to suit your needs.
eg: - your model:
class TestUser
include Mongoid::Document
field :email, type: String
validates :email, email: true
end
Your validator (goes in app/validators/email_validator.rb)
class EmailValidator < ActiveModel::EachValidator
EM...
How to compare two strings in dot separated version format in Bash?
...]}))
then
return 2
fi
done
return 0
}
testvercomp () {
vercomp $1 $2
case $? in
0) op='=';;
1) op='>';;
2) op='<';;
esac
if [[ $op != $3 ]]
then
echo "FAIL: Expected '$3', Actual '$op', Arg1 '$1', Arg2 '$2...
Memcached下一站：HandlerSocket！ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...战
首先创建一个测试用的表：
CREATE TABLE IF NOT EXISTS `test`.`t` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`a` varchar(10) NOT NULL,
`b` varchar(10) NOT NULL,
PRIMARY KEY (`id`),
KEY `a_b` (`a`,`b`)
) ENGINE=InnoDB;
注：理论上HandlerSocket支持MyISAM...
Browser detection in JavaScript? [duplicate]
...|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
if(/trident/i.test(M[1])){
tem= /\brv[ :]+(\d+)/g.exec(ua) || [];
return 'IE '+(tem[1] || '');
}
if(M[1]=== 'Chrome'){
tem= ua.match(/\b(OPR|Edge?)\/(\d+)/);
if(tem!= null) return tem.slice(1).join(...
How to flatten tree via LINQ?
...
I disagree: compiled, tested, and working with c. Using e doesn't compile. You can also add if (e == null) return Enumerable.Empty<T>(); to cope with null child lists.
– Adam Houldsworth
Aug 6 '12 at 15...
Check if string contains only digits
...
how about
let isnum = /^\d+$/.test(val);
share
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Determining Whether a Directory is Writeable
...
Testing a directory for just the write bit isn't enough if you want to write files to the directory. You will need to test for the execute bit as well if you want to write into the directory. os.access('/path/to/folder', os.W...
Configure nginx with multiple locations with different root folders on subdomain
...rective for location /static:
server {
index index.html;
server_name test.example.com;
root /web/test.example.com/www;
location /static/ {
alias /web/test.example.com/static/;
}
}
The nginx wiki explains the difference between root and alias better than I can:
Note that it m...
What is the use of join() in Python threading?
...example, say we have this:
def non_daemon():
time.sleep(5)
print 'Test non-daemon'
t = threading.Thread(name='non-daemon', target=non_daemon)
t.start()
Which finishes with:
print 'Test one'
t.join()
print 'Test two'
This will output:
Test one
Test non-daemon
Test two
Here the mast...
How would you implement an LRU cache in Java?
...t more ingrained in my head.
So here is the simplest version with a unit test that shows it works based on some other versions.
First the non-concurrent version:
import java.util.LinkedHashMap;
import java.util.Map;
public class LruSimpleCache<K, V> implements LruCache <K, V>{
...