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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)

I understand that in Swift all variables must be set with a value, and that by using optionals we can set a variable to be set to nil initially. ...
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Maximum size of an Array in Javascript

Context: I'm building a little site that reads an rss feed, and updates/checks the feed in the background. I have one array to store data to display, and another which stores ID's of records that have been shown. ...
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Chrome Dev Tools - “Size” vs “Content”

...in the Network tab of Chrome's dev tools, one column specifies both "size" and "content": 4 Answers ...
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What is the meaning of the term arena in relation to memory?

... arena , but never defines it. I've searched for the meaning of the word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the term: ...
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How do you print in a Go test using the “testing” package?

... The structs testing.T and testing.B both have a .Log and .Logf method that sound to be what you are looking for. .Log and .Logf are similar to fmt.Print and fmt.Printf respectively. See more details here: http://golang.org/pkg/testing/#pkg-index ...
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What's the “average” requests per second for a production web application?

...mory database...still need to test with live DB. DB may be our bottleneck and bring us back down unless we switch to nosql). – Dean Hiller Jun 6 at 0:28 ...
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Visual Studio “Could not copy” … during build

...d success by doing the following: Closing Visual Studio Deleting the bin and obj folders, and Reopening Visual Studio. This "bug" has existed since Visual Studio 2003. Finally, I have also found that I can often overcome this problem by simply renaming the executable file and then deleting it. ...
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Declaring a custom android UI element using XML

How do I declare an Android UI element using XML? 6 Answers 6 ...
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Get the real width and height of an image with JavaScript? (in Safari/Chrome)

... Webkit browsers set the height and width property after the image is loaded. Instead of using timeouts, I'd recommend using an image's onload event. Here's a quick example: var img = $("img")[0]; // Get my img elem var pic_real_width, pic_real_height; $...
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Why isn't String.Empty a constant?

... which we can access from native. I found this information from this handy article at CodeProject. share | improve this answer | follow | ...