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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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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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Zero-based month numbering [closed]

... The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 an...
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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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PHP server on local machine?

...d I'm wanting to test my PHP files without uploading them to my host. Basically testing them on my own machine before I upload them. How do I do that? ...
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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...
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Is there Selected Tab Changed Event in the standard WPF Tab Control

... I tied this in the handler to make it work: void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (e.Source is TabControl) { //do work when tab is changed } } sh...