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How to install a specific version of a ruby gem?

Using the command-line gem tool, how can I install a specific version of a gem? 6 Answers ...
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How to ensure a form field is submitted when it is disabled?

...b server? Isn't it the client that renders the page with the select field, and thus in case of conflict like that it would be the client that decides whether to send the value to the server or not? – Ilari Kajaste Jul 22 '11 at 15:38 ...
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What does !! mean in ruby?

...ly not necessary to use though since the only false values to Ruby are nil and false, so it's usually best to let that convention stand. Think of it as !(!some_val) One thing that is it used for legitimately is preventing a huge chunk of data from being returned. For example you probably don't ...
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Custom HTTP Authorization Header

...custom data in an HTTP authorization header. We're designing a RESTful API and we may need a way to specify a custom method of authorization. As an example, let's call it FIRE-TOKEN authentication. ...
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What are the downsides to using Dependency Injection? [closed]

I'm trying to introduce DI as a pattern here at work and one of our lead developers would like to know: What - if any - are the downsides to using the Dependency Injection pattern? ...
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A non-blocking read on a subprocess.PIPE in Python

I'm using the subprocess module to start a subprocess and connect to its output stream (standard output). I want to be able to execute non-blocking reads on its standard output. Is there a way to make .readline non-blocking or to check if there is data on the stream before I invoke .readline ? I'...
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Generic type parameter naming convention for Java (with multiple chars)?

... By convention, type parameter names are single, uppercase letters. This stands in sharp contrast to the variable naming conventions that you already know about, and with good reason: Without this convention, it would be difficult to tell the difference between a type variable and an ordinary class ...
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Sending images using Http Post

I want to send an image from the android client to the Django server using Http Post. The image is chosen from the gallery. At present, I am using list value name Pairs to send the necessary data to the server and receiving responses from Django in JSON. Can the same approach be used for images (wit...
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WebClient vs. HttpWebRequest/HttpWebResponse

...aders, protocol, etc... In the response, you can also retrieve the cookies and headers share | improve this answer | follow | ...
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How to combine two jQuery results

... You can use add(); var $foos = $('.foo'); var $foosAndBars = $foos.add('.bar'); or var $allFoosAndBars = $allFoos.add($allBars); share | improve this answer | ...