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How to set a Timer in Java?

How to set a Timer, say for 2 minutes, to try to connect to a Database then throw exception if there is any issue in connection? ...
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How to rollback just one step using rake db:migrate

After adding migration files in the db/migrate folder and running rake db:migrate , I want get back to the previous step, I think using VERSION=n is the right way to do that, but I don't know the correct value of n to use. Is there any command to check the current n value? ...
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How do I work with a git repository within another repository?

I have a Git media repository where I'm keeping all of my JavaScript and CSS master files and scripts that I'll use on various projects. ...
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Capturing “Delete” Keypress with jQuery

When using the example code from the jQuery documentation for the keypress event handler, I'm unable to capture the Delete key. The snippet below is going to log 0 when the Delete key is pressed in FireFox: ...
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How to make the overflow CSS property work with hidden as value

I am having a tough time with overflow: hidden . 5 Answers 5 ...
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Use gulp to select and move directories and their files

I'm currently using gulp to call a bash script that cleans my dist/ directory and moves the appropriate files to the clean directory. I would like this to be done with gulp because I am not sure the script would work on a non *nix file system. So far, I'm using the gulp-clean module to clean the...
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Do declared properties require a corresponding instance variable?

Do properties in Objective-C 2.0 require a corresponding instance variable to be declared? For example, I'm used to doing something like this: ...
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Finding differences between elements of a list

Given a list of numbers, how does one find differences between every ( i )-th elements and its ( i+1 )-th? 10 Answers ...
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What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?

Ruby has two different exceptions mechanisms: Throw/Catch and Raise/Rescue. 3 Answers ...
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What's to stop malicious code from spoofing the “Origin” header to exploit CORS?

The way I understand it, if a client-side script running on a page from foo.com wants to request data from bar.com, in the request it must specify the header Origin: http://foo.com , and bar must respond with Access-Control-Allow-Origin: http://foo.com . ...