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When to use .First and when to use .FirstOrDefault with LINQ?

I've searched around and haven't really found a clear answer as to when you'd want to use .First and when you'd want to use .FirstOrDefault with LINQ. ...
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Length of a JavaScript object

...an break enumerations in various libraries. Adding methods to Object is usually safe, though. Here's an update as of 2016 and widespread deployment of ES5 and beyond. For IE9+ and all other modern ES5+ capable browsers, you can use Object.keys() so the above code just becomes: var size = Object...
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Are memory leaks ever ok? [closed]

...forced this situation on me, it would lead me to seriously suspect the overall quality of the library in question. It would be as if I test drove a car and found a couple loose washers and nuts in one of the cupholders – it may not be a big deal in itself, but it portrays a lack of commitment to ...
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How to find out where a function is defined?

... @EHerman I don't think you can find callers of a function with reflection. If you could it probably wouldn't work well for this because PHP files tend to be included on demand, and so you would likely not have all the code loaded which does call the function. ...
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Port 80 is being used by SYSTEM (PID 4), what is that?

...P adress is 0.0.0.0, state = LISTENING: means that port 80 is listening to all interfaces (not used) How to read NETSTAT -AN results: https://sites.google.com/site/xiangyangsite/home/technical-tips/linux-unix/networks-related-commands-on-linux/how-to-read-netstat--an-results ...
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iOS 7 style Blur view

...bove, I recently reworked the blurs in GPUImage to support variable radii, allowing for the complete replication of the blur size in iOS 7's control center view. From that, I created the GPUImageiOS7BlurFilter class that encapsulates the proper blur size and color correction that Apple appears to be...
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How do you implement a private setter when using an interface?

...Foo { get; private set; } // private public int Foo { get { return _foo; } // no setter } public void Poop(); // this member also not part of interface Setter is not part of interface, so it cannot be called via your interface: IBar bar = new Bar(); bar.Foo = 42; // will not work thu...
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Java String to SHA1

...g Base64. Apache Commons Codec API 1.4, has this nice utility to take away all the pain. refer here share | improve this answer | follow | ...
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Cell spacing in UICollectionView

... This is a much better answer. Take a look at the callbacks you can adjust in the UICollectionViewDelegateFlowLayout and you can see how this can be tweaked. – cynistersix Dec 17 '14 at 2:52 ...
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How to convert byte array to Bitmap

...itmap bmp = Bitmap.createBitmap(imageWidth, imageHeight, Bitmap.Config.ARGB_8888); ByteBuffer buffer = ByteBuffer.wrap(bitmapdata); bmp.copyPixelsFromBuffer(buffer); Check https://developer.android.com/reference/android/graphics/Bitmap.Config.html for different color options ...