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Favourite performance tuning tricks [closed]
...ndy-dandy list of things I always give to someone asking me about optimisation.
We mainly use Sybase, but most of the advice will apply across the board.
SQL Server, for example, comes with a host of performance monitoring / tuning bits, but if you don't have anything like that (and maybe even if...
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
6
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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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App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...浏览带端口url的页面，这款拓展统统解决。
.aix 拓展下载：
cn.fun123.CustomWebView.aix
基础使用方法：
例如，使用此拓展访问 react 写的网页，效果如下：
而使用原生的Web浏览器则无法访问：
属性
AdHo...
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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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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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...
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...
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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