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How does facebook, gmail send the real time notification?
... read some posts about this topic and the answers are comet, reverse ajax, http streaming, server push, etc.
5 Answers
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What happens if you static_cast invalid value to enum class?
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What's the purpose of using braces (i.e. {}) for a single-line if or loop?
I'm reading some lecture notes of my C++ lecturer and he wrote the following:
23 Answers
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Migrating from JSF 1.2 to JSF 2.0
...n of faces-config.xml to comply JSF 2.0 spec.
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2....
Is it possible to await an event instead of another async method?
In my C#/XAML metro app, there's a button which kicks off a long-running process. So, as recommended, I'm using async/await to make sure the UI thread doesn't get blocked:
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What are all the differences between src and data-src attributes?
...a-xxx that you want to select.
MDN documentation on data-xxxx attributes: https://developer.mozilla.org/en-US/docs/DOM/element.dataset
Example of src on an image tag where the image loads the JPEG for you and displays it:
<img id="myImage" src="http://mydomain.com/foo.jpg">
<script>
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
Sometimes when I run an application on device from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What...
How to subtract 30 days from the current datetime in mysql?
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WHERE exec_datetime BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW();
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add
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Why does the C# compiler not fault code where a static method calls an instance method?
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Why is a boolean 1 byte and not 1 bit of size?
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