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Singular or plural controller and helper names in Rails

Is there any disadvantage to using singular names for controllers and helpers? Nothing seems to rely on this. It even seems helpers don't have to make the same choice about singular vs. plural as their corresponding controllers, at least according to my limited experimentation. Is that true? ...
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Bootstrap css hides portion of container below navbar navbar-fixed-top

I am building a project with Bootstrap and im facing little issue .I have a container below the Nav-top.My issue is that some portion of my container is hidden below the nav-top header.I dont want to use top-margin with container. Pls see below html in which im facing the issue ...
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Use JavaScript to place cursor at end of text in text input element

...ay (and I presume simplest way) to place the cursor at the end of the text in a input text element via JavaScript - after focus has been set to the element? ...
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Change Placeholder Text using jQuery

I am using a jQuery placeholder plugin(https://github.com/danielstocks/jQuery-Placeholder). I need to change the placeholder text with the change in dropdown menu. But it is not changing. Here is the code: ...
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Is Ruby pass by reference or by value?

@user object adds errors to the lang_errors variable in the update_lanugages method. when I perform a save on the @user object I lose the errors that were initially stored in the lang_errors variable. ...
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Determine if running on a rooted device

My app has a certain piece of functionality that will only work on a device where root is available. Rather than having this feature fail when it is used (and then show an appropriate error message to the user), I'd prefer an ability to silently check if root is available first, and if not,hide the ...
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Cleanest way to build an SQL string in Java

I want to build an SQL string to do database manipulation (updates, deletes, inserts, selects, that sort of thing) - instead of the awful string concat method using millions of "+"'s and quotes which is unreadable at best - there must be a better way. ...
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What is the difference between . (dot) and $ (dollar sign)?

... The $ operator is for avoiding parentheses. Anything appearing after it will take precedence over anything that comes before. For example, let's say you've got a line that reads: putStrLn (show (1 + 1)) If you want to get rid of those parentheses,...
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How to Implement DOM Data Binding in JavaScript

Please treat this question as strictly educational. I'm still interested in hearing new answers and ideas to implement this ...
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Android ImageView Zoom-in and Zoom-Out

I want to Zoom-in and Zoom-out an Android ImageView. I tried most of the samples but in all of them the image in the ImageView itself is getting Zoomed-in and Zoomed-out, while I want to Zoom-in and Zoom-out the ImageView. I want to increase the ImageView width and height while Zooming-in and reduce...