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Different types of thread-safe Sets in Java

... 1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old array, avoiding necessity of synchronization between...
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When NOT to use yield (return) [duplicate]

...is h deep. Then there will at most points be O(h) nested iterators built. Calling "MoveNext" on the outer iterator will then make O(h) nested calls to MoveNext. Since it does this O(n) times for a tree with n items, that makes the algorithm O(hn). And since the height of a binary tree is lg n <=...
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Sequence contains no elements?

...boxes for the title and content, the ID and date aren't put on the page at all. Could this be the reason for it passing them as null\new? – Andy Hunt Aug 24 '09 at 19:43 2 ...
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How to Get the Title of a HTML Page Displayed in UIWebView?

... Edit: just saw you found out the answer... sheeeiiitttt I literally just learned this! To do this, you don't even need to have it displayed in UIWebView. (But as you are using it, you can just get the URL of the current page) Anyways, here's the code and some (feeble) explanation: ...
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Detect if called through require or directly by command line

How can I detect whether my Node.JS file was called using SH: node path-to-file or JS: require('path-to-file') ? 5 Answers...
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UITableView row animation duration and completion callback

...o either specify the duration for UITableView row animations, or to get a callback when the animation completes? 10 Answers...
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Why is a div with “display: table-cell;” not affected by margin?

... Cause From the MDN documentation: [The margin property] applies to all elements except elements with table display types other than table-caption, table and inline-table In other words, the margin property is not applicable to display:table-cell elements. Solution Consider using the bo...
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What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }

... It's usually to namespace (see later) and control the visibility of member functions and/or variables. Think of it like an object definition. The technical name for it is an Immediately Invoked Function Expression (IIFE). jQuery plug...
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WebSockets protocol vs HTTP

...kets is better for situations that involve low-latency communication especially for low latency for client to server messages. For server to client data you can get fairly low latency using long-held connections and chunked transfer. However, this doesn't help with client to server latency which req...
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HTTP Basic Authentication - what's the expected web browser experience?

When a server allows access via Basic HTTP Authentication, what is the experience expected to be in a web browser ? 6 Answ...