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Python - Create a list with initial capacity
...0x slower than other languages due to Python features like decorators etc (https://wiki.python.org/moin/PythonSpeed/PerformanceTips#Data_Aggregation#Data_Aggregation).
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How can I pass a parameter to a setTimeout() callback?
...o = "Hello World";
setTimeout(alert, 1000, hello);
More details:
https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers.setTimeout
http://arguments.callee.info/2008/11/10/passing-arguments-to-settimeout-and-setinterval/
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When should I use malloc in C and when don't I?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Best XML Parser for PHP [duplicate]
...lass also makes xml generation very easy.
you can download this class at
http://freshmeat.net/projects/crxml
or from phpclasses.org
http://www.phpclasses.org/package/6769-PHP-Manipulate-XML-documents-as-array.html
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What are the disadvantages of using persistent connection in PDO
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In response to Charles' problem above,
From : http://www.php.net/manual/en/mysqli.quickstart.connections.php -
A common complain about persistent connections is that their state is not reset before reuse. For example, open and unfinished transactions are not automatical...
Base64 encoding and decoding in client-side Javascript
...rowser solution, there are existing libraries like CryptoJS or code like:
http://ntt.cc/2008/01/19/base64-encoder-decoder-with-javascript.html
With the latter, you need to thoroughly test the function for cross browser compatibility. And error has already been reported.
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Qt events and signal/slots
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There is an article that discusses event processing in some detail: http://www.packtpub.com/article/events-and-signals
It discussions the difference between events and signals here:
Events and signals are two parallel mechanisms used to accomplish the
same thing. As a general differenc...
How to design a database for User Defined Fields?
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You can read an interesting article from 2009 about this solution here: http://backchannel.org/blog/friendfeed-schemaless-mysql
Or you can use a document-oriented database, where it's expected that you have custom fields per document. I'd choose Solr.
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Javascript when to use prototypes
... more like instance method.
The object's approach is like Static methods.
https://developer.mozilla.org/en/Introduction_to_Object-Oriented_JavaScript
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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...等，关于不同的设备ideal viewport的宽度都为多少，可以到http://viewportsizes.com去查看一下，里面收集了众多设备的理想宽度。
再总结一下：ppk把移动设备上的viewport分为layout viewport 、 visual viewport 和 ideal viewport 三类，其中的...