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Simulate airplane mode in iPhone Simulator
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Turn off your network connection on the Mac.
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Change UICollectionViewCell size on different device orientations
I am using an UICollectionView with UICollectionViewFlowLayout .
6 Answers
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Objective-C - Remove last character from string
In Objective-C for iOS, how would I remove the last character of a string using a button action?
4 Answers
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What should Xcode 6 gitignore file include?
...y default.
2)
Another answer is that there's a website called "gitignore.io" , which generates the files based on the .gitignore templates from https://github.com/github/gitignore.
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How to check if a file exists in a folder?
... Noe that this answer returns false if the user does not have permission to read the file. So it does more than just checkinf if the file exists in a folder. You might want to use DirectoryInfo.GetFiles() and enumerate the result.
– ogborstad
Feb 10 '15 a...
Getting output of system() calls in Ruby
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You can do expression evaluation just as you would with regular strings: ls #{filename}.
– Craig Walker
Dec 27 '09 at 17:38
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Why does PostgreSQL perform sequential scan on indexed column?
...ster than an index scan.
This is because an index scan requires several IO operations for each row (look up the row in the index, then retrieve the row from the heap). Whereas a sequential scan only requires a single IO for each row - or even less because a block (page) on the disk contains more...
汇编语言超浓缩教程（汇编入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...不是汇编的强项，大家不妨玩玩DEBUG，有时CRACK出一个小软件比完成一个程序更有成就感（就像学电脑先玩游戏一样）。某些高深的指令事实上只对有经验的汇编程序员有用，对我们而言，太过高深了。为了使学习汇编语言有个...
String isNullOrEmpty in Java? [duplicate]
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I was confused between the distinction between blank and empty, so I looked it up; blank means, "", null, and any amount of whitespace; empty is just "" and null.
– James McMahon
Feb 16 '10 at 15:50
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Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
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