大约有 42,000 项符合查询结果（耗时：0.0713秒） [XML]
Can you use if/else conditions in CSS?
...class="normal">Text</p>
<p class="active">Text</p>
and in your CSS file:
p.normal {
background-position : 150px 8px;
}
p.active {
background-position : 4px 8px;
}
That's the CSS way to do it.
Then there are CSS preprocessors like Sass. You can use conditionals there...
nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
...n be caused if you have a nginx configuration that is listening on port 80 and also on port [::]:80.
I had the following in my default sites-available file:
listen 80;
listen [::]:80 default_server;
You can fix this by adding ipv6only=on to the [::]:80 like this:
listen 80;
listen [::]:80 ipv6o...
Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
...e
copying. Use the reference operator to
copy an array by reference.
And the given example :
<?php
$arr1 = array(2, 3);
$arr2 = $arr1;
$arr2[] = 4; // $arr2 is changed,
// $arr1 is still array(2, 3)
$arr3 = &$arr1;
$arr3[] = 4; // now $arr1 and $arr3 are the same
?>
...
Remove CSS class from element with JavaScript (no jQuery) [duplicate]
...cript only?
Please do not give me an answer with jQuery as I can't use it, and I don't know anything about it.
13 Answers
...
Working with README.md on github.com [closed]
...st your Markdown documents.
Update 2012-11-08: Efforts are underway to standardize the Markdown syntax. See The Future of Markdown - Jeff Atwood, Coding Horror and W3C Markdown Community Group.
Update 2014-09-09: CommonMark a markdown standard and spec has been released.
...
Has Facebook sharer.php changed to no longer accept detailed parameters?
...eters in sharer.php
The sharer will no longer accept custom parameters and facebook will
pull the information that is being displayed in the preview the same
way that it would appear on facebook as a post from the url OG meta
tags.
Use dialog/feeds instead of sharer.php
https://www.face...
Advantage of switch over if-else statement
...0 have an expected action (that presently is the same action). Performance and space need to be considered but are not critical. I've abstracted the snippet so don't hate me for the naming conventions.
...
How does one change the language of the command line interface of Git?
... in my Linux installation without changing the language for other programs and couldn’t find the settings.
How to do it?
...
Batch script to delete files
...eak for the OP, but on my system there's no problem finding a path with %, and escaping with %% keeps the system from finding it.
– RonaldBarzell
Dec 7 '12 at 13:36
...
Where do I find the current C or C++ standard documents?
For many questions the answer seems to be found in "the standard". However, where do we find that? Preferably online.
12 An...