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Sending a message to nil in Objective-C

...ize(); ++i){ System.out.println(list.get(i).toString()); } } Now, if you call that method like so: someObject.foo(NULL); you're going to probably get a NullPointerException when it tries to access list, in this case in the call to list.size(); Now, you'd probably never call someObject....
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Using Notepad++ to validate XML against an XSD

...r use Menu if this is your preference Plugins > XML Tools > Validate Now). Following dialog will open: Click on .... Point to XSD file and I am pretty sure you'll be able to handle things from here. Hope this saves you some time. EDIT: Plugin manager was not included in some versions of No...
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?

...U, I've been trying to figure out a good way to do this for a couple hours now. This worked perfectly. Wish I could give you more upvotes! This should definitely be the answer. – thaspius Jan 27 '16 at 18:25 ...
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How do you usually Tag log entries? (android)

... This is probably not longer recommended since tag length is now restricted to 23 characters – Claudio Redi Dec 9 '15 at 14:07 ...
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How does __proto__ differ from constructor.prototype?

...sheds full light over the matter http://i.stack.imgur.com/KFzI3.png I know I'm not the first one making this up but it was more interesting figuring it out that finding it :-). Anyway, after that I found e.g. this another diagram that I think says basicly the same: Javascript object layout The...
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String is immutable. What exactly is the meaning? [duplicate]

...efore coming to any conclusion. This is how String works: String str = "knowledge"; This, as usual, creates a string containing "knowledge" and assigns it a reference str. Simple enough? Lets perform some more functions: String s = str; // assigns a new reference to the same string "knowle...
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How to create a directory and give permission in single command

...r is much better because it spawns one process instead of three. I didn't know about the -m option. share | improve this answer | follow | ...
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What is the use of the ArraySegment class?

...ent<T> has become a lot more useful in .NET 4.5+ and .NET Core as it now implements: IList<T> ICollection<T> IEnumerable<T> IEnumerable IReadOnlyList<T> IReadOnlyCollection<T> as opposed to the .NET 4 version which implemented no interfaces whatsoever. The cl...
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How to calculate the time interval between two time strings

...statistics mean and variance functions work directly with timedelta object now? Any thought on that? Also, any help to compute the variance of timedelta objects will be useful. – CKM Feb 9 '17 at 10:04 ...
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How do I launch the Android emulator from the command line?

...om the terminal. I have successfully created the HelloWorld project and now I'm trying to run it from the command line in the Android emulator. Which command runs the emulator for my HelloWorld project? ...