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What does the “__block” keyword mean?

What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know... ...
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Sequelize.js delete query?

Is there a way to write a delete/deleteAll query like findAll? 9 Answers 9 ...
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When should you not use virtual destructors?

...o not declare a virtual destructor for a class? When should you specifically avoid writing one? 12 Answers ...
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How to pass values between Fragments

... I tried step 5, That i'm calling listactivity from fragment and after selecting item from that activity, i want to come back in fragment with selected file name. But its not working, its giving me Nullpointer Exception at onCreateView. Any solution on...
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How to use a custom comparison function in Python 3?

...e a workaround, but I think I am going to lose some performance by passing all the comparison operators < > = to middle man, since my original custom sort is written in C , it had around 1/2x speed of default sort. – YOU Mar 28 '10 at 5:26 ...
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How do I check in JavaScript if a value exists at a certain array index?

... Conceptually, arrays in JavaScript contain array.length elements, starting with array[0] up until array[array.length - 1]. An array element with index i is defined to be part of the array if i is between 0 and array.length - 1 inclu...
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How does Dijkstra's Algorithm and A-Star compare?

...t; but it is a special case of the more general algorithm A*. It is not at all unusual (in fact, probably the norm) for special cases to be discovered first, and then subsequently be generalized . – Pieter Geerkens Sep 2 '13 at 15:37 ...
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How to convert an array to object in PHP?

...lue) { $object->$key = $value; } As Edson Medina pointed out, a really clean solution is to use the built-in json_ functions: $object = json_decode(json_encode($array), FALSE); This also (recursively) converts all of your sub arrays into objects, which you may or may not want. Unfortunat...
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How to convert all tables from MyISAM into InnoDB?

I know I can issue an alter table individually to change the table storage from MyISAM to InnoDB. 26 Answers ...
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Log all requests from the python-requests module

...I need to debug some OAuth activity, and for that I would like it to log all requests being performed. I could get this information with ngrep , but unfortunately it is not possible to grep https connections (which are needed for OAuth ) ...