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validation custom message for rails 3

Rails has introduced new way to validate attributes inside model. When I use 4 Answers ...
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UINavigationController without navigation bar?

I have a universal app, and on the iPad version I'm using UISplitViewController to create an interface similar to the Mail app. ...
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Format bytes to kilobytes, megabytes, gigabytes

Scenario: the size of various files are stored in a database as bytes. What's the best way to format this size info to kilobytes, megabytes and gigabytes? For instance I have an MP3 that Ubuntu displays as "5.2 MB (5445632 bytes)". How would I display this on a web page as "5.2 MB" AND have files le...
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What is the fundamental difference between WebSockets and pure TCP?

I've read about WebSockets and I wonder why browser couldn't simply open trivial TCP connection and communicate with server like any other desktop application. And why this communication is possible via websockets? ...
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How to copy from CSV file to PostgreSQL table with headers in CSV file?

I want to copy a CSV file to a Postgres table. There are about 100 columns in this table, so I do not want to rewrite them if I don't have to. ...
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JavaScript ternary operator example with functions

I am using jQuery 1.7.1 6 Answers 6 ...
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I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?

Kindly This is my code below, and I am pasting the error messages underneath: I am trying to use setOnItemClickListener on the spinner, is it permissible? ...
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How to get controls in WPF to fill available space?

Some WPF controls (like the Button ) seem to happily consume all the available space in its' container if you don't specify the height it is to have. ...
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Webfont Smoothing and Antialiasing in Firefox and Opera

I have custom-made web fonts used on my site. To style my rendering output, I used the following code: 8 Answers ...
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Comparing arrays in JUnit assertions, concise built-in way?

Is there a concise, built-in way to do equals assertions on two like-typed arrays in JUnit? By default (at least in JUnit 4) it seems to do an instance compare on the array object itself. ...