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Why would one use nested classes in C++?

Can someone please point me towards some nice resources for understanding and using nested classes? I have some material like Programming Principles and things like this IBM Knowledge Center - Nested Classes ...
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onCreateOptionsMenu inside Fragments

... onCreateOptionsMenu() for fragments has different arguments than for Activities. – Jorge Dec 23 '13 at 13:34 3 ...
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How can I record a Video in my Android App.?

...ecorder(); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceDestroyed(SurfaceHolder holder) { if (recording) { recorder.stop(); recording = false; } recorder.rele...
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Error Code: 1005. Can't create table '…' (errno: 150)

I searched for a solution to this problem on the Internet and checked the Stack Overflow questions, but none of the solutions worked for my case. ...
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Linq to Sql: Multiple left outer joins

... I like this approach better than using all the into statements. Thanks for posting this! – Bryan Roth Mar 22 '10 at 21:57 7 ...
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ListView addHeaderView causes position to increase by one?

... instead of ListAdapter.getItem(position) as the ListView version accounts for the headers, ie:- Do this instead: myListView.getItemAtPosition(position) share | improve this answer | ...
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How to make input type= file Should accept only pdf and xls

... Unfortunately, there is no guaranteed way to do it at time of selection. Some browsers support the accept attribute for input tags. This is a good start, but cannot be relied upon completely. <input type="file" name="pic"...
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Remove duplicates from an array of objects in JavaScript

... A primitive method would be: var obj = {}; for ( var i=0, len=things.thing.length; i < len; i++ ) obj[things.thing[i]['place']] = things.thing[i]; things.thing = new Array(); for ( var key in obj ) things.thing.push(obj[key]); ...
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Return 0 if field is null in MySQL

... thank you so much !! This is exactly what i was looking for – brunobliss Dec 21 '16 at 13:22 @MarkB...
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How to implement the Android ActionBar back button?

...roid:value="com.example.ParentActivity" /> </activity> See here for further reading. share | improve this answer | follow | ...