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How do I programmatically determine if there are uncommitted changes?

In a Makefile, I'd like to perform certain actions if there are uncommitted changes (either in the working tree or the index). What's the cleanest and most efficient way to do that? A command that exits with a return value of zero in one case and non-zero in the other would suit my purposes. ...
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How to append a char to a std::string?

The following fails with the error prog.cpp:5:13: error: invalid conversion from ‘char’ to ‘const char*’ 13 Answer...
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Is there some way to PUSH data from web server to browser?

... Yes, what you're looking for is COMET http://en.wikipedia.org/wiki/Comet_(programming). Other good Google terms to search for are AJAX-push and reverse-ajax. share | ...
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Vertically centering a div inside another div [duplicate]

...nter; align-items: center; } Demo More examples & possibilities: Compare all the methods on one pages share | improve this answer | follow | ...
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Writing a dict to txt file and reading it back?

I am trying to write a dictionary to a txt file. Then read the dict values by typing the keys with raw_input . I feel like I am just missing one step but I have been looking for a while now. ...
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In a bootstrap responsive page how to center a div

...tstrap 4 Simpler vertical grid alignement with flex-box @import url('https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css'); html, body { height: 100% } <div class="h-100 row align-items-center"> <div class="col" style="background:red"> TEXT ...
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What is the “realm” in basic authentication

... From RFC 1945 (HTTP/1.0) and RFC 2617 (HTTP Authentication referenced by HTTP/1.1) The realm attribute (case-insensitive) is required for all authentication schemes which issue a challenge. The realm value (case-sensitive), in combi...
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RabbitMQ / AMQP: single queue, multiple consumers for same message?

...t solve your problem, but could be useful for people to know. example here http://www.rabbitmq.com/tutorials/tutorial-two-java.html under Fair Dispatch – Ommit Jan 27 '15 at 22:35 ...
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Provide an image for WhatsApp link sharing

...ll link to the current webpage address <meta property="og:url" content="https://www.example.com/webpage/" /> Step 5: og:description Maximum 65 characters <meta property="og:description" content="description of your website/webpage"> Step 6: og:image Image(JPG or PNG) with a size less...
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How can I create a keystore?

...application. For more information about Keytool, see the documentation at: http://docs.oracle.com/javase/6/docs/technotes/tools/windows/keytool.html and for more information on signing Android apps go here: http://developer.android.com/tools/publishing/app-signing.html ...