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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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Tested & Working Version
User.select(:first,:email).group(:first,:email).having("count(*) > 1")
Also, this is a little unrelated but handy. If you want to see how times each combination was found, put .size at the end:
User.select...
How do I deep copy a DateTime object?
... $date1 and $date2 contain the same date -- three years from now. I'd like to create two separate datetimes, one which is parsed from a string and one with three years added to it. Currently I've hacked it up like this:
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Passing data to a bootstrap modal
I've got a couple of hyperlinks that each have an ID attached. When I click on this link, I want to open a modal ( http://twitter.github.com/bootstrap/javascript.html#modals ), and pass this ID to the modal. I searched on google, but I couldn't find anything that could help me.
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How do I get the user agent with Flask?
I'm trying to get access to the user agent with Flask, but I either can't find the documentation on it, or it doesn't tell me.
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What is the cleanest way to disable CSS transition effects temporarily?
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Short Answer
Use this CSS:
.notransition {
-webkit-transition: none !important;
-moz-transition: none !important;
-o-transition: none !important;
transition: none !important;
}
Plus either this JS (without jQuery)...
someElement.classList.add('notransition'); // ...
What is the difference between D3 and jQuery?
... you directly manipulate elements, but with D3 you provide data and callbacks through D3's unique data(), enter() and exit() methods and D3 manipulates elements.
D3 is usually used for data visualization but jQuery is used for creating web apps. D3 has many data visualization extensions and jQuery h...
Remove unused imports in Android Studio
I recently started Android Studio IDE to make my android apps. I find shortkey to remove unused import in Android Studio is not working ( Ctrl + Shift + O )
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Find size of object instance in bytes in c#
... a warning: what follows is strictly in the realm of ugly, undocumented hacks. Do not rely on this working - even if it works for you now, it may stop working tomorrow, with any minor or major .NET update.
You can use the information in this article on CLR internals MSDN Magazine Issue 2005 May - D...
Calculating frames per second in a game
...e? I want to show it as a number in the corner of the screen. If I just look at how long it took to render the last frame the number changes too fast.
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ASP.NET MVC 404 Error Handling [duplicate]
... answered Apr 4 '09 at 20:04
Mike ChaliyMike Chaliy
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