大约有 49,000 项符合查询结果（耗时：0.0603秒） [XML]
rails 3 validation on uniqueness on multiple attributes
...
you can still do it the rails 2 way, and I find that more readable unless you're doing several types of validation on the same property.
– zem
Jul 3 '11 at 23:29
...
jQuery’s .bind() vs. .on()
...d from future versions at any time. There is no reason to keep using .bind and every reason to prefer .on instead.
share
|
improve this answer
|
follow
|
...
Is there a command to list all Unix group names? [closed]
...
To list all local groups which have users assigned to them, use this command:
cut -d: -f1 /etc/group | sort
For more info- >
Unix groups,
Cut command,
sort command
share
|
improve this answ...
How Do I Get the Query Builder to Output Its Raw SQL Query as a String?
...eed to enable this as it's turned off by default now. You can use this command to turn it on temporarily: DB::enableQueryLog();
– Joshua Fricke
Jan 3 '16 at 20:51
...
How to see JavaDoc in IntelliJ IDEA? [duplicate]
...shows javadoc info. I think the way to show it is to use a shortcut - command + J , but when I click it, I get something wrong as on the screen shot below. Please advise me on how I can quickly get javadoc information. I need to at least know what type a method returns.
...
What is the difference between string primitives and String objects in JavaScript?
...
JavaScript has two main type categories, primivites and objects.
var s = 'test';
var ss = new String('test');
The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actu...
What is the Bash equivalent of Python's pass statement
...
true is a command that successfully does nothing.
(false would, in a way, be the opposite: it doesn't do anything, but claims that a failure occurred.)
share
...
SQL Server 2012 column identity increment jumping from 6 to 1000+ on 7th entry [duplicate]
...normal. Microsoft added sequences in SQL Server 2012, finally, i might add and changed the way identity keys are generated. Have a look here for some explanation.
If you want to have the old behaviour, you can:
use trace flag 272 - this will cause a log record to be generated for each generated i...
How do I lowercase a string in Python?
...y2casefold - several answers address this here.
Unicode Python 3
Python 3 handles plain string literals as unicode:
>>> string = 'Километр'
>>> string
'Километр'
>>> string.lower()
'километр'
Python 2, plain string literals are bytes
In Python 2, t...
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
...so force using a socket with the socket parameter (-S with /usr/bin/mysql) and force TCP/IP by providing a port (-P with /usr/bin/mysql.)
– Kaoru
Jun 1 '14 at 11:17
...