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How can I rename a database column in a Ruby on Rails migration?
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http://api.rubyonrails.org/classes/ActiveRecord/Migration.html
Under Available Transformations
rename_column(table_name, column_name, new_column_name):
Renames a column but keeps the type and content.
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Using margin:auto to vertically-align a div
...many browsers still do not support it or require vendor prefixes. Refer to http://caniuse.com/flexbox for updated browser support information.
Update
Since this answer received a bit of attention, I would also like to point out that you don't need to specify margin at all if you're using display: fl...
How to get an IFrame to be responsive in iOS Safari?
... the document it contains is wider than what you have specified. Example:
http://jsbin.com/hapituto/1
On a desktop browser, you will see an iFrame and a Div both set to 300px. The contents is wider so you can scroll the iFrame.
On mobile safari, however, you will notice that the iFrame is auto-ex...
jquery append to front/top of list
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</div>
$('.container').prepend('<p>Test</p>');
refer http://api.jquery.com/prepend/ for more info.
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What is the difference between window, screen, and document in Javascript?
...e enough. But what happens once an IFRAME is introduced?
See more at: http://eligeske.com/jquery/what-is-the-difference-between-document-and-window-objects-2/#sthash.CwLGOk9c.dpuf
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How to make a class property? [duplicate]
...leaned it up, and added tests for anyone that wants to use it: gist.github.com/Skinner927/413c0e9cc8433123f426832f9fe8d931
– Skinner927
Jul 25 '19 at 22:53
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Understanding Spliterator, Collector and Stream in Java 8
I am having trouble understanding the Stream interface in Java 8, especially where it has to do with the Spliterator and Collector interfaces. My problem is that I simply can't understand Spliterator and the Collector interfaces yet, and as a result, the Stream interface is still somewha...
Memcached vs APC which one should I choose? [closed]
I read this article: http://www.mysqlperformanceblog.com/2006/09/27/apc-or-memcached/ from way back when.. I want to get the best caching engine available so that my application is really fast. Of course I don't want to over-cache but I want to at least choose the best thing out there. In that art...
Response.Redirect with POST instead of Get?
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Doing this requires understanding how HTTP redirects work. When you use Response.Redirect(), you send a response (to the browser that made the request) with HTTP Status Code 302, which tells the browser where to go next. By definition, the browser will make tha...
Add subdomain to localhost URL
... You're going to have to just use the port in your URL as usual, e.g., http://subdomain.example.com:1234/whatever. The port is entirely separate from the domain (domains are used for identifying the machine, ports are used for identifying which program on the machine to communicate with).
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