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    <p><strong>Edit:</strong> As @Ben mentions, first check whether the array variable is out of scope. I would also add that it's <em>possible</em> that the object has been reclaimed (either by -dealloc or GC) so check to make sure it's retained if needed.</p> <p>If this problem occurs all the time for all arrays, you may have unintentionally changed the <a href="http://developer.apple.com/documentation/DeveloperTools/Conceptual/XcodeDebugging/600-Viewing_Variables_and_Memory/variables_and_memory.html#//apple_ref/doc/uid/TP40007057-CH9-SW24" rel="nofollow noreferrer">data formatter</a> summary string in the Xcode debugger. When you change a data formatter, it overrides the default values. For example, the NSArray formatter is in this file:</p> <p><code>/Developer/Library/Xcode/CustomDataViews/Foundation.plist</code></p> <p>You can <a href="https://stackoverflow.com/questions/1019172/">create your own data formatters</a> which can be stored in plist files or bundles in this directory:</p> <p><code>~/Library/Application Support/Developer/Shared/Xcode/CustomDataViews/</code></p> <p>Dynamically-specified custom data formatters (those that are typed directly into the summary fields of the Xcode debugger) are stored in this directory:</p> <p><code>~/Library/Application Support/Apple/Developer Tools/CustomDataViews/</code></p> <p>If a <strong><code>CustomDataViews.plist</code></strong> file exists in that directory, I suggest moving it out of the way to see if your problem goes away. If it does, and you don't need any of the custom formatters it defines, (you can examine it with Property List Editor or any text editor) it's probably safe to trash it.</p>
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    1. POStrange Descriptions for Arrays in XCode debugger
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    1. COThis happens for all arrays, so I don't think its a retaining problem. I checked out the custom data views with no luck. Unfortunately moving the plist in ~/Library/Application Support/Apple/Developer Tools/CustomDataViews/ had no effect and there were no files in ~/Library/Application Support/Developer/Shared/Xcode/CustomDataViews/ And here is the entry in for arrays in /Developer/Library/Xcode/CustomDataViews/Foundation.plist <key>NSArray *</key> <dict> <key>SummaryString</key> <string>{(int)[$VAR count]} objects</string> </dict> Which looks pretty good to me.
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    2. CODangit. Crappy formatting.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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