大约有 40,000 项符合查询结果（耗时：0.0406秒） [XML]
Can I have multiple background images using CSS?
...
CSS3 allows this sort of thing and it looks like this:
body {
background-image: url(images/bgtop.png), url(images/bg.png);
background-repeat: repeat-x, repeat;
}
The current versions of all the major browsers now suppor...
jQuery, simple polling example
...
setinterval would make an ajax call every 5 seconds no matter what. the way have written it (which i believe is good practice) will wait for the results THEN make another ajax request 5 seconds later. there are times i would use setinterval, but this is not...
Truncate all tables in a MySQL database in one command?
Is there a query (command) to truncate all the tables in a database in one operation? I want to know if I can do this with one single query.
...
How do I print out the contents of an object in Rails for easy debugging?
...
I generally first try .inspect, if that doesn't give me what I want, I'll switch to .to_yaml.
class User
attr_accessor :name, :age
end
user = User.new
user.name = "John Smith"
user.age = 30
puts user.inspect
#=> #<User:0x...
Get current date/time in seconds
...
@Nick - I think all examples are necessarily speculative and will sound contrived - but I'll take a shot :) Suppose you have data time stamped with unix time, and want to determine it's age. More though I think this is what is most likely me...
Using .gitignore to ignore everything but specific directories
...
Here's how I did it - you essentially have to walk up the paths, you can't wildcard more than one level in any direction:
# Ignore everything:
*
# Except for the themes directories:
!wordpress/
!wordpress/*/
!wordpress/*/wp-content/
!wordpress/*/wp-conten...
Normal arguments vs. keyword arguments
How are "keyword arguments" different from regular arguments? Can't all arguments be passed as name=value instead of using positional syntax?
...
Change URL parameters
...Val;
return baseURL + "?" + newAdditionalURL + rows_txt;
}
Function Calls:
var newURL = updateURLParameter(window.location.href, 'locId', 'newLoc');
newURL = updateURLParameter(newURL, 'resId', 'newResId');
window.history.replaceState('', '', updateURLParameter(window.location.href, "param",...
Javascript add leading zeroes to date
... Very nice way of doing it. I think the accepted answer is really nice, but this even cleaner in my opinion
– Binke
Jan 19 '16 at 10:52
1
...
When would I use XML instead of SQL? [closed]
... would be more useful than the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
...