大约有 1,742 项符合查询结果（耗时：0.0203秒） [XML]
Managing CSS Explosion
...in: 0;
font-size: 11px;
}
...
#some .selector {
border: 1px solid #000;
margin: 0;
}
Avoid using TAGs as selectors, when you can use id/classes
First off the DIV and SPAN tags are the exception: you should never use them, ever! ;) Only use them to attach a class/id.
This...
div#answ...
OPTION (RECOMPILE) is Always Faster; Why?
...ere are 10 records in your database and then execute it when there are 100,000,000 records the cached execution plan may no longer be the most effective.
In summary - I don't see any reason that OPTION(RECOMPILE) would be a benefit here. I suspect you just need to update your statistics and your e...
What is the colon operator in Ruby?
...e some of the things mentioned in the answers:
require 'benchmark'
n = 1_000_000
print '"foo".equal? "foo" -> ', ("foo".equal? "foo"), "\n"
print '"foo" == "foo" -> ', ("foo" == "foo" ), "\n"
print ':foo.equal? :foo -> ', (:foo.equal? :foo ), "\n"
print ':foo == :foo ->...
Read file line by line using ifstream in C++
... are interesting. I have tested the code with ASCII files that contain 100,000 lines, 1,000,000 lines and 10,000,000 lines of text. Each line of text contains 10 words in average. The program is compiled with -O3 optimization and its output is forwarded to /dev/null in order to remove the logging ti...
Unique (non-repeating) random numbers in O(1)?
I'd like to generate unique random numbers between 0 and 1000 that never repeat (i.e. 6 doesn't show up twice), but that doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
I installed LAMP on Ubuntu 12.04 LTS (Precise Pangolin) and then set root password on phpMyAdmin . I forgot the password and now I am unable to login. When I try to change password through terminal I get:
...
How to escape JSON string?
...efault:
if (c < ' ') {
t = "000" + String.Format("X", c);
sb.Append("\\u" + t.Substring(t.Length - 4));
} else {
sb.Append(c);
}
break;
...
Are GUID collisions possible?
I'm working on a database in SQL Server 2000 that uses a GUID for each user that uses the app it's tied to. Somehow, two users ended up with the same GUID. I know that microsoft uses an algorithm to generate a random GUID that has an extremely low chance of causing collisons, but is a collision stil...
How can I output leading zeros in Ruby?
... see the documentation on this now (ruby-doc.org/core/classes/String.html#M000770), but it's very concise and I'd like a little elaboration.
– Nathan Long
Oct 9 '09 at 11:29
1
...
How can I get the count of milliseconds since midnight for the current?
...
Do you mean?
long millis = System.currentTimeMillis() % 1000;
BTW Windows doesn't allow timetravel to 1969
C:\> date
Enter the new date: (dd-mm-yy) 2/8/1969
The system cannot accept the date entered.
...