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Adding Core Data to existing iPhone project

...o manually import the header in the files you need them. So open up Xcode and look for some file like App_Prefix.pch, by default it's in the Other Sources group. After the UIKit import statement, add the following line: #import <CoreData/CoreData.h> And you should be ready to go. Xcode 4 ...
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Can I store the .git folder outside the files I want tracked?

...e git as a backup system. So let's say I have a directory ./backup/myfiles and I want to back that up using git. To keep things clean I don't want to have a .git directory in the myfiles folder, so I thought I could create ./backup/git_repos/myfiles. From looking at the git docs, I've tried doing th...
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favicon.png vs favicon.ico - why should I use PNG instead of ICO?

... Answer replaced (and turned Community Wiki) due to numerous updates and notes from various others in this thread: ICOs and PNGs both allow full alpha channel based transparency ICO allows for backwards compatibility to older browsers (e.g. ...
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Xcode 4 hangs at “Attaching to (app name)”

I just upgraded to Xcode 4 and for some reason my app won't run in the simulator or iOS device. It was working perfectly in Xcode 3, but all of a sudden now when I press run the program stops at "Attaching to...". There doesn't seem to be any other info to help with this problem either. ...
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Convert SQLITE SQL dump file to POSTGRESQL

...n POSTGRESQL. I just updated my local database with a huge amount of data and need to transfer a specific table to the production database. ...
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Understanding MongoDB BSON Document size limit

...r to 20k) So except for truly bizarre situations, it'll work great. And in the exception case or spam, I really don't think you'd want a 20mb object anyway. I think capping trackbacks as 15k or so makes a lot of sense no matter what for performance. Or at least special casing if i...
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How do I avoid capturing self in blocks when implementing an API?

I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...
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What does InitializeComponent() do, and how does it work in WPF?

What does InitializeComponent() do, and how does it work in WPF? 2 Answers 2 ...
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Android studio: why are minSdkVersion and targetSdkVersion specified both in AndroidManifest.xml and

I just discovered something weird about Android studio: it has some configuration options in the build.gradle file that override what is specified in the AndroidManifest.xml file. ...
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How do I solve the INSTALL_FAILED_DEXOPT error?

I am developing an Android application using Android 2.2, my application APK size is 22.5 MB, and I would like to create a new build for a Samsung tablet. I got the following error: ...