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Getting a random value from a JavaScript array
...s to performance optimization while producing output using UI elements, ~~ wins the game. MORE INFO
var rand = myArray[~~(Math.random() * myArray.length)];
But if you know that the array is going to have millions of elements than you might want to reconsider between Bitwise Operator and Math.Floor(...
Overriding a Rails default_scope
...rder('created_at desc')
end
Foo.reorder('created_at asc')
runs the following SQL:
SELECT * FROM "foos" ORDER BY created_at asc
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两大桌面系统之战：Yosemite vs Windows 10 - 操作系统(内核) - 清泛网 - ...
两大桌面系统之战：Yosemite vs Windows 10哪个更好，哪个最好？每个人都有自己的标准，但是 Windows 10 更新中的特性和功能是否足以和 OS X Yosemite 竞争？
全新 Windows 10 操作系统已经在 7 月 29 日正式发布。就和移动行业中的 iO...
Changing website favicon dynamically
...d here). Here is a different demo of code that works in IE11 too. The following example might not work in Safari or Internet Explorer.
/*!
* Dynamically changing favicons with JavaScript
* Works in all A-grade browsers except Safari and Internet Explorer
* Demo: http://mathiasbynens.be/demo/dyna...
Indentation shortcuts in Visual Studio
...aligned vertically for it to be any use. This is one area where RAD Studio wins hands down.
– David Heffernan
Jan 26 '12 at 9:17
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Install an apk file from command prompt?
I want to install a file using the Windows command line. First I want to build after compiling all the .jar files to create an .apk file for an Android application without using Eclipse.
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How best to include other scripts?
... (And a nice warning about the script not being able to find dependencies) wins.
– Aaron H.
Oct 29 '10 at 16:54
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Load image from resources area of project in C#
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Are you using Windows Forms? If you've added the image using the Properties/Resources UI, you get access to the image from generated code, so you can simply do this:
var bmp = new Bitmap(WindowsFormsApplication1.Properties.Resources.myima...
Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a work
...at eclipse was looking at the previous "real" location, as opposed to following the symlink, and this was causing the errors.
In my case, I just moved the workspace back to its old location.
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Easy way to concatenate two byte arrays
...sure, optimize it. Otherwise, readability and maintainability might be the winning considerations.
– vikingsteve
Dec 6 '13 at 15:35
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