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What does @synchronized() do as a singleton method in objective C?

I just created a singleton method, and I would like to know what the function @synchronized() does, as I use it frequently, but do not know the meaning. ...
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Change Screen Orientation programmatically using a Button

I think this is implementable since screen rotation behaviour can go up to the application level. 5 Answers ...
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How to get child element by class name?

...ildNodes[i].className == "4") { notes = doc.childNodes[i]; break; } } ​ share | improve this answer | follow | ...
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Class type check in TypeScript

In ActionScript, it is possible to check the type at run-time using the is operator : 3 Answers ...
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What is the @Html.DisplayFor syntax for?

I understand that in Razor, @Html does a bunch of neat things, like generate HTML for links, inputs, etc. 4 Answers ...
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How Does Modulus Divison Work

I don't really understand how modulus division works. I was calculating 27 % 16 and wound up with 11 and I don't understand why. ...
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Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'

...te has got some secured parts that can be logged into using Google, Facebook, ...etc (OAuth). 16 Answers ...
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Better way to check if a Path is a File or a Directory?

... @KeyMs92 Its bitwise math. Basically, attr is some binary value with one bit meaning "this is a directory". The bitwise and & operator will return a binary value where only the bits that are on (1) in both the operands a...
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ElasticSearch: Unassigned Shards, how to fix?

...p. If you're still seeing issues, something else is probably wrong, so look in your Elasticsearch logs for errors. If you see EsRejectedExecutionException your thread pools may be too small. Finally, you can explicitly reassign a shard to a node with the reroute API. # Suppose shard 4 of index "m...
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How to check for a valid URL in Java?

What is the best way to check if a URL is valid in Java? 8 Answers 8 ...