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How do I test a file upload in rails?
... upload a user's avatar image" do
image = fixture_path + "/test_avatar.png"
file = ActionController::TestUploadedFile.new image, "image/png"
post :create, :user => { :avatar => file }
User.last.avatar.original_filename.should == "test_avatar.png"
end
end
This spec would req...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...= 600;
CreateMatrix(w, h, rand.NextDouble).Save("System.Random.png", ImageFormat.Png);
CreateMatrix(w, h, qrand.Random).Save("QuickRandom.png", ImageFormat.Png);
}
private static Image CreateMatrix(int width, int height, Func<double> f)
{
...
Fade/dissolve when changing UIImageView's image
...hen all you need is:
UIImage * toImage = [UIImage imageNamed:@"myname.png"];
[UIView transitionWithView:self.imageView
duration:5.0f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
self...
XmlNode与XmlElement的区别总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...我并没有发现XmlElement有ChildNodes属性。举例如下：
<Book img="aspnet.jpg"> //是XmlNode也是XmlElement，但是img以及aspnet.jpg只是XmlNode
<Name> //既是XmlNode 也是XmlElement
C# //只是XmlNode
</Name>
</Book>
也就是元素节点可...
Discuz 前台个人签名档不能插入图片的问题解决 - 更多技术 - 清泛网 - 专注...
...的问题解决该现象是由于会员用户组不允许签名中使用[img]代码，DZ默认只有管理组能使用。用户 -> 用户组 -> 编辑 -> 论坛相关(帖子相关)：选择是，ok。该现象是由于会员用户组不允许签名中使用[img]代码，DZ默认只有管理组能使...
css3 实现静态图片闪烁效果 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...现静态图片闪烁效果css代码： *图标闪烁动画效果* titleM img { animation: start 1 5s infinite ease-in-out; -moz-animation: start css代码：
/*图标闪烁动画效果*/
.titleM img {
animation: start 1.5s infinite ease-in-out;
-moz-animation: start 1.5s infi...
How to pass command line argument to gnuplot?
...how to use more than 1 input parameter with shell variables:
output=test1.png
data=foo.data
gnuplot -e "datafile='${data}'; outputname='${output}'" foo.plg
and foo.plg:
set terminal png
set outputname
f(x) = sin(x)
plot datafile
As you can see,more parameters are passed with semi colons (like...
Can I change the height of an image in CSS :before/:after pseudo-elements?
...e block, however.
.pdflink:after {
background-image: url('/images/pdf.png');
background-size: 10px 20px;
display: inline-block;
width: 10px;
height: 20px;
content:"";
}
See the full Compatibility Table at the MDN.
...
What's so bad about in-line CSS?
...ss inline, by which I mean: <element style='color:red'> or even <img style='float:right'> It's very convenient, but doesn't reflect actual selector specificity in a real css file later, and if you keep it, you'll regret the maintenance load later.
Prototype with <style> instead
...
How to join absolute and relative urls?
..., there's a problem. For example, urljoin('http://www.a.com/', '../../b/c.png'), the result is 'http://www.a.com/../../b/c.png', but not http://www.a.com/b/c.png. So, is there any method to get http://www.a.com/b/c.png?
– bigwind
Jul 2 '14 at 3:54
...