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Rails respond_with: how does it work?

I've been reading here and there about how cool the respond_with method is in Rails 3. But I can't even find a reference to it in either the Rails APIs or by searching the source. Can anyone either explain to me how it works (what options you can use, etc) or point me to the place it's actually im...
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How does the vim “write with sudo” trick work?

...d by the shell, which does not run as root. It's the same as echo hi > /read/only/file. – WhyNotHugo May 23 '15 at 2:15  |  show 16 more co...
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How do I apply a perspective transform to a UIView?

...is kind of perspective operation. The code should be reasonably simple to read. The sublayerTransform you refer to in your response is a transform that is applied to the sublayers of your UIView's CALayer. If you don't have any sublayers, don't worry about it. I use the sublayerTransform in my e...
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HashMap get/put complexity

...ipedia entry for hash table in your answer? That way, the more interested reader could get to the nitty gritty of understanding why you gave your answer. – David Weiser Dec 29 '10 at 15:19 ...
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Do I cast the result of malloc?

...type in this case. It adds clutter to the code, casts are not very easy to read (especially if the pointer type is long). It makes you repeat yourself, which is generally bad. It can hide an error if you forgot to include <stdlib.h>. This can cause crashes (or, worse, not cause a crash until w...
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how to check and set max_allowed_packet mysql variable [duplicate]

...work on shared hosting: SET GLOBAL max_allowed_packet=16777216; You can read about it here http://dev.mysql.com/doc/refman/5.1/en/packet-too-large.html EDIT The [mysqld] is necessary to make the max_allowed_packet working since at least mysql version 5.5. Recently setup an instance on AWS EC2...
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How can I see all the issues I'm watching on Github?

...ngle place https://github.com/notifications By default, this will show unread notifications (also indicated by a mailbox with a number in the top right corner). From that page you can choose "All Notifications", or https://github.com/notifications?all=1 to see all the issues being watched that hav...
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Remove .php extension with .htaccess

Yes, I've read the Apache manual and searched here. For some reason I simply cannot get this to work. The closest I've come is having it remove the extension, but it points back to the root directory. I want this to just work in the directory that contains the .htaccess file. ...
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Pass Variables by Reference in Javascript

...e mentioned below, though in this case about Java. It occurred to me while reading the back-and-forth in the Reddit comments that a big part of the confusion stems from the unfortunate collision involving the word "reference". The terminology "pass by reference" and "pass by value" predates the conc...
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Found conflicts between different versions of the same dependent assembly that could not be resolved

...'s a killer article on this stuff by SO's own @Nick Craver that you should read While the other responses say this, they don't make it explicit, so I will.... On VS2013.2, to actually trigger the emission of the cited information, you need to not read the message, which says: C:\Program Files (x86...