大约有 45,000 项符合查询结果(耗时:0.0428秒) [XML]

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How to add to the PYTHONPATH in Windows, so it finds my modules/packages?

... You know what has worked for me really well on windows. My Computer > Properties > Advanced System Settings > Environment Variables > Just add the path as C:\Python27 (or wherever you installed python) OR Then under system variables I create a new Variabl...
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Oracle SQL: Update a table with data from another table

...s will occur in an unpredictable manner (i.e. last value in unordered data wins). Thirdly: It will be much slower. Assuming the outcome of the for loop was intended, the original subselect could have been rewritten in some controlled way to return only 1 value for each record... simplest contrived w...
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Why isn't vector a STL container?

...<bool> as a special standard container where each bool uses only one bit of space rather than one byte as a normal bool would (implementing a kind of "dynamic bitset"). In exchange for this optimization it doesn't offer all the capabilities and interface of a normal standard container. In thi...
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How can I divide two integers to get a double?

...3) //0.1158748551564310544611819235 Double are represented allocating 64 bits while decimal uses 128 (double)100/863 //0.11587485515643106 In depth explanation of "precision" For more details about the floating point representation in binary and its precision take a look at this article from J...
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What is the purpose of the “final” keyword in C++11 for functions?

...y disadvantage of vtables is that for any such virtual object (assuming 64-bits on a typical Intel CPU) the pointer alone eats up 25% (8 of 64 bytes) of a cache line. In the kind of applications I enjoy to write, this hurts very badly. (And from my experience it is the #1 argument against C++ from a...
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STAThread and multithreading

... must use the Single-Threaded Apartment model if it displays any graphical windows. This is why [STAThread] is always displayed on top of the main method in a windows forms application. – Justin Ethier May 15 '09 at 13:43 ...
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Are there any free Xml Diff/Merge tools available? [closed]

... Have a look at at File comparison tools, from which I am using WinMerge. It has an ability to compare XML documents (you may wish to enable DisplayXMLFiles prefilter). DisplayXMLFiles.dll - This plugin pretty-prints XML files nicely by inserting tabs and line breaks. This is useful for ...
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Convert blob to base64

... Arun KilluArun Killu 10.6k55 gold badges2828 silver badges5656 bronze badges ...
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How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?

...econds with'%Q tho. – Mini John Feb 10 '15 at 2:13 3 To follow up on @TheMiniJohn's answer. It lo...
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How to use background thread in swift?

...to add a completion handler to when 4 async calls all finish? I know its a bit off-topic. – eonist Feb 28 '17 at 11:16 1 ...