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What is NSZombie?

... It's a memory debugging aid. Specifically, when you set NSZombieEnabled then whenever an object reaches retain count 0, rather than being deallocated it morphs itself into an NSZombie instance. Whenever such a zombie receives a message, it logs a warning rather ...
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?

...hat will become IEnumerable<out T>. That doesn't hurt type safety at all, but lets you return an IEnumerable<string> from a method declared to return IEnumerable<object> for instance. Contravariance is harder to give concrete examples for using interfaces, but it's easy with a del...
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Byte[] to InputStream or OutputStream

...it to InputStream or OutputStream . But I don't know what happens internally when I do so. Can anyone briefly explain me what's happening when I do this conversion? ...
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How to export JavaScript array info to csv (on client side)?

...ure but I need to do this using JavaScript. I am using Dojo 1.8 and have all the attribute info in array, which looks like this: ...
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Adding a column to a data.frame

... @RomanLuštrik, This solution can be rewritten really nicely in a single line. Using your your.df data, you can simply do your.df$group = cumsum(your.df[, 1]==1) to get your new group column. – A5C1D2H2I1M1N2O1R2T1 Apr 16 '12 at 17:47 ...
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Open file via SSH and Sudo with Emacs

...: or su:hostname: with remote hosts. The trap here is that sudo:: does actually appear to work -- however when you do that the HOST for the dynamic proxy entry will be the hostname you originated from rather than the host you connected to. This will not only look confusing (as the wrong host will be...
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where is gacutil.exe?

...amilyId=F26B1AA4-741A-433A-9BE5-FA919850BDBF&displaylang=en . This installation will have gacutil.exe included. But first check it here C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin you might have it installed. As @devi mentioned If you decide to grab gacutil files from existing ins...
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CSS to set A4 paper size

I need simulate an A4 paper in web and allow to print this page as it is show on browser (Chrome, specifically). I set the element size to 21cm x 29.7cm, but when I send to print (or print preview) it clip my page. ...
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Why can't stash be applied to the working directory?

...elete the local file, rather: move it somewhere else apply the stash manually merge the two file versions (working tree vs. moved). share | improve this answer | follow ...
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ASP.NET MVC3 - textarea with @Html.EditorFor

... edited Dec 17 '13 at 17:09 Tallmaris 7,42533 gold badges2424 silver badges5757 bronze badges answered Feb 7 '11 at 21:49 ...