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How do I center floated elements?
...margin-left: 3px;
background: url(/images/structure/pagination-button.png);
}
(remove the lines starting with - and add the lines starting with +.)
.pagination {
text-align: center;
}
.pagination a {
+ display: inline-block;
width: 30px;
height: 30px;
margin-left: 3px;
...
How can I extract a good quality JPEG image from a video file with ffmpeg?
...
Output the images in a lossless format such as PNG:
ffmpeg.exe -i 10fps.h264 -r 10 -f image2 10fps.h264_%03d.png
Then use another program (where you can more precisely specify quality, subsampling and DCT method – e.g. GIMP) to convert the PNGs you want to JPEG.
It ...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...导入了一个名为innodb_memcached_config.sql的脚本，它除了导入测试数据外，还创建了Memcached插件所需要的配置信息：
mysql> USE innodb_memcache
mysql> SHOW TABLES;
+---------------------------+
| Tables_in_innodb_memcache |
+---------------------------+
| cache...
how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
...").on("error", function(){
$(this).attr('src', './images/nopicture.png');
});
});
</script>
<img class='backup_picture' src='./images/nonexistent_image_file.png' />
You simply need to add class='backup_picture' to any img tag that you want a backup picture to load if it tr...
Is it possible to make relative link to image in a markdown file in a gist?
...
https://gist.github.com/user/605560c2961cb3025038/raw/b75d2...6e8/img.png
is that the b75d2...6e8 part varies per file (a quick experimentation confirms it is the git blob id). However you can drop that part resulting in a URL pointing to the latest version:
https://gist.github.com/user/6055...
Query for array elements inside JSON type
... its elements:
WITH reports(data) AS (
VALUES ('{"objects":[{"src":"foo.png"}, {"src":"bar.png"}]
, "background":"background.png"}'::json)
)
SELECT *
FROM reports r, json_array_elements(r.data#>'{objects}') obj
WHERE obj->>'src' = 'foo.png';
The CTE (WITH query) just su...
How to write a caption under an image?
...">
<a href="http://xyz.com/hello">
<img src="hello.png" width="100px" height="100px">
<div class="caption">Caption 1</div>
</a>
<a href="http://xyz.com/hi">
<img src="hi.png" width="100px" height="100px">
<d...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...个东西，具体的情况可以看下这篇文章。
devicePixelRatio的测试结果：
三、PPK的关于三个viewport的理论
ppk大神对于移动设备上的viewport有着非常多的研究（第一篇，第二篇，第三篇），有兴趣的同学可以去看一下，本文中有...
CSS image resize percentage of itself?
...ntered in middle of original size.
html:
<img class="fake" src="example.png" />
css:
img {
-webkit-transform: scale(0.5); /* Saf3.1+, Chrome */
-moz-transform: scale(0.5); /* FF3.5+ */
-ms-transform: scale(0.5); /* IE9 */
-o-transform: scale(0.5); /* Opera 10.5+ */
...
Switching a DIV background image with jQuery
...ere is how I do it:
CSS
#button{
background-image: url("initial_image.png");
}
#button.toggled{
background-image:url("toggled_image.png");
}
JS
$('#button').click(function(){
$('#my_content').toggle();
$(this).toggleClass('toggled');
});
...