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What is the difference between float and double?

...the difference between double precision and single precision. However, in most cases, float and double seem to be interchangeable, i.e. using one or the other does not seem to affect the results. Is this really the case? When are floats and doubles interchangeable? What are the differences betwe...
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How to measure elapsed time in Python?

...eryPerformanceCounter(). The resolution is typically better than one microsecond. Deprecated since version 3.3: The behaviour of this function depends on the platform: use perf_counter() or process_time() instead, depending on your requirements, to have a well defined behaviour. ...
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Convert SVG image to PNG with PHP

...etImageFormat("png24"); $im->resizeImage(720, 445, imagick::FILTER_LANCZOS, 1); /*Optional, if you need to resize*/ /*jpeg*/ $im->setImageFormat("jpeg"); $im->adaptiveResizeImage(720, 445); /*Optional, if you need to resize*/ $im->writeImage('/path/to/colored/us-map.png');/*(or .jpg)*...
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ImportError: No module named matplotlib.pyplot

... installed on your machine, one is the standard python that comes with Mac OSX and the second is the one you installed with ports (this is the one that has matplotlib installed in its library, the one that comes with macosx does not). /usr/bin/python Is the standard mac python and since it doesn'...
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How to include external Python code to use in other files?

If you have a collection of methods in a file, is there a way to include those files in another file, but call them without any prefix (i.e. file prefix)? ...
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How to make links in a TextView clickable?

... Buried in the API demos I found the solution to my problem: Link.java: // text2 has links specified by putting <a> tags in the string // resource. By default these links will appear but not // respond to user input. To make ...
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Copy paste text into iOS simulator

...ator's clipboard. They are not the same. The simulator is simulating an iOS device, with it's own iOS clipboard which apps running on that device (simulator) use via the iOS pup-up select-all/copy/paste UI items. Completely separate from that: your mac has it's own clipboard and content. The Simu...
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Markup XML解析库下载(Markup.h 和 Markup.cpp) - 源码下载 - 清泛网 - 专注C/C++及内核技术

...RKUP_WCHAR wide char (2-byte UTF-16 on Windows, 4-byte UTF-32 on Linux and OS X) // MARKUP_MBCS ANSI/double-byte strings on Windows // MARKUP_STL (default except VC++) use STL strings instead of MFC strings // MARKUP_SAFESTR to use string _s functions in VC++ 2005 (_MSC_VER >= 1400) // MARKUP_WI...
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how to check redis instance version?

... (Which, reading more carefully, wouldn't have helped OP. Still, I think most readers will find issuing info from a client more helpful than running redis-server on the host. – cluesque Aug 19 at 14:51 ...
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Meaning of Choreographer messages in Logcat [duplicate]

...ce. Android view animations internally uses Choreographer for the same purpose: to properly time the animations and possibly improve performance. Since Choreographer is told about every vsync events, it can tell if one of the Runnables passed along by the Choreographer.post* apis doesn't finish in o...