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What is Prefix.pch file in Xcode?

...uestion has been already answered in thread I'm linking below. It contains all the information you need as well as useful comments. Is it OK to remove Prefix.pch file from the Xcode project? share | ...
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iOS 7 style Blur view

...bove, I recently reworked the blurs in GPUImage to support variable radii, allowing for the complete replication of the blur size in iOS 7's control center view. From that, I created the GPUImageiOS7BlurFilter class that encapsulates the proper blur size and color correction that Apple appears to be...
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Detect a finger swipe through JavaScript on the iPhone and Android

How can you detect that a user swiped his finger in some direction over a web page with JavaScript? 21 Answers ...
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sed one-liner to convert all uppercase to lowercase?

I have a textfile in which some words are printed in ALL CAPS. I want to be able to just convert everything in the textfile to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.' ...
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How to get HTTP Response Code using Selenium WebDriver

... the response code of a http request using Selenium and Chrome or Firefox. All you have to do is start either Chrome or Firefox in logging mode. I will show you some examples below. java + Selenium + Chrome Here is an example of java + Selenium + Chrome, but I guess that it can be done in any lang...
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How to inspect the return value of a function in GDB?

...4-yellowdog-linux-gnu"... (no debugging symbols found) Using host libthread_db library "/lib64/libthread_db.so.1". (gdb) break __libc_start_main Breakpoint 1 at 0x10013cb0 (gdb) r Starting program: /bin/ls (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no de...
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set gvim font in .vimrc file

... So basically for Windows all you need is to add set guifont=Consolas:h11:cANSI to the ~/.vimrc file – Jasdeep Khalsa Aug 14 '13 at 15:21 ...
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What is the difference between “text” and new String(“text”)?

... a reference to an instance of class String, and is derived from a CONSTANT_String_info structure (§4.4.3) in the binary representation of a class or interface. The CONSTANT_String_info structure gives the sequence of Unicode code points constituting the string literal. The Java programming la...
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搭建高可用mongodb集群(三)—— 深入副本集内部机制 - 大数据 & AI - 清...

...为1是不显示的,这里标示出来。 rs.conf(); { "_id" : "rs0", "version" : 9, "members" : [ { "_id" : 0, "host" : "192.168.1.136:27017" }, { ...
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Are Swift variables atomic?

... you, i.e.: class Car { static let sharedCar: Car = Car() // will be called inside of dispatch_once } private let sharedCar: Car2 = Car2() // same here class Car2 { } Update 05/25/16: Keep an eye out for swift evolution proposal https://github.com/apple/swift-evolution/blob/master/proposals...