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Detect the Internet connection is offline?

...your domain. You could put an onerror in an img, like <img src='http://www.example.com/singlepixel.gif' onerror='alert("Connection dead");' /> This method could also fail if the source image is moved / renamed, and would generally be an inferior choice to the ajax option. So there ...
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ALTER TABLE without locking the table?

... See Facebook's online schema change tool. http://www.facebook.com/notes/mysql-at-facebook/online-schema-change-for-mysql/430801045932 Not for the faint of heart; but it will do the job. share ...
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How to test an Android Library Project

... http://www.paulbutcher.com/2010/09/android-library-project-with-tests-step-by-step/ helps describe the process needed to implement the second suggestion in CommonsWare's answer ...
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PHP: How to send HTTP response code?

...le. This problem is also mentioned on PHP website by a user comment http://www.php.net/manual/en/function.http-response-code.php#112423 For your reference here there is the full list of HTTP response status codes (this list includes codes from IETF internet standards as well as other IETF RFCs. M...
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What's the best way to model recurring events in a calendar application?

...45 RFC 5545). Ones to come to mind quickly are the Mozilla projects http://www.mozilla.org/projects/calendar/ A quick search reveals http://icalendar.rubyforge.org/ as well. Other options can be considered depending on how you're going to store the events. Are you building your own database schem...
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Checking if an Android application is running in the background

...ries { ... google() jcenter() maven { url 'https://maven.google.com' } } } You can read more about Lifecycle related architecture components here - https://developer.android.com/topic/libraries/architecture/lifecycle ...
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How do I put an already-running process under nohup?

...e: % jobs [1] running java [2] suspended vi % disown %1 See http://www.quantprinciple.com/invest/index.php/docs/tipsandtricks/unix/jobcontrol/ for a more detailed discussion of Unix Job Control. share | ...
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2 column div layout: right column with fixed width, left fluid

... See http://www.alistapart.com/articles/negativemargins/ , this is exactly what you need (example 4 there). <div id="container"> <div id="content"> <h1>content</h1> <p>Lorem ipsum dolor ...
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What is compiler, linker, loader?

...tack are created, register gets initialized. Little Extra info :- http://www.geeksforgeeks.org/memory-layout-of-c-program/ , you can see the memory layout over there. share | improve this answe...
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AngularJs “controller as” syntax - clarification?

...for building up the scope object. Here are some more info on this: http://www.syntaxsuccess.com/viewarticle/551798f20c5f3f3c0ffcc9ff share | improve this answer | follow ...