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How to check if hex color is “too black”?
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You have to extract the three RGB components individually, and then use a standard formula to convert the resulting RGB values into their perceived brightness.
Assuming a six character colour:
var c = c.substring(1); // strip #
var rgb = parseInt(c, 16); // convert rrg...
Best way to run scheduled tasks [closed]
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All of my tasks (which need to be scheduled) for a website are kept within the website and called from a special page. I then wrote a simple Windows service which calls this page every so often. Once the page runs it return...
Ruby on Rails Server options [closed]
..., Mongrel, Passenger, Apache, Nginx and many more I am sure, and I don't really understand the different roles they play.
1...
What are the differences between django-tastypie and djangorestframework? [closed]
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EDIT Outdated answer, tastypie is not really maintained anymore. Use Django REST framework if you have to choose a framework to do REST.
For an overview about the actual differences between both of them you should read their documentation. They are both more or le...
StackOverflow程序员推荐：每个程序员都应读的30本书 - 杂谈 - 清泛网 - 专...
...。
本书是基于众多商务案例，讲述如何创建更好的、高客户忠诚度的软件产品和基于软件的高科技产品的书。本书列举了很多真实可信的实际例子，说明目前在软件产品和基于软件的高科技产品中，普遍存在着“难用”的问题...
How to Convert JSON object to Custom C# object?
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Since we all love one liners code
Newtonsoft is faster than java script serializer.
... this one depends on the Newtonsoft NuGet package, which is popular and better than the default serializer.
if we have class then use below.
My...
How do I inspect the view hierarchy in iOS?
...UI tool that inspects the view hierarchy of an iOS app? I'm thinking about Webkit's web inspector or similar tools. I'm looking to debug layout issues, like views having the wrong position or size, or a child not being properly contained in its parent. Currently I have to add asserts that test these...
A simple explanation of Naive Bayes Classification
... & part two being the confusion surrounding Training set.
In general all of Machine Learning Algorithms need to be trained for supervised learning tasks like classification, prediction etc. or for unsupervised learning tasks like clustering.
During the training step, the algorithms are taught...
How can I convert an image into Base64 string using JavaScript?
.../jpg, image/gif, image/bmp, image/tiff, image/x-icon, image/svg+xml, image/webp, image/xxx
Supported output formats:
image/png, image/jpeg, image/webp(chrome)
Browser Support:
http://caniuse.com/#feat=canvas
Internet Explorer 10 (Internet Explorer 10 just works with same origin images)
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Batch file to delete files older than N days
I am looking for a way to delete all files older than 7 days in a batch file. I've searched around the web, and found some examples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task.
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