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Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...
Is the pImpl idiom really used in practice?
...ss, I would consider caution because all those benefits come at a cost: an extra level of indirection is required in order to access the implementation methods.
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How do I decode a string with escaped unicode?
... this is called so I'm having trouble searching for it. How can I decode a string with unicode from http\u00253A\u00252F\u00252Fexample.com to http://example.com with JavaScript? I tried unescape , decodeURI , and decodeURIComponent so I guess the only thing left is string replace.
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How do I get a Date without time in Java?
...is asking about how to get a Date object - that answer formats a date to a string, which isn't the same thing. Fundamentally, asking what date a Date is on is a meaningless question without more information: the time zone and the calendar system you're using.
– Jon Skeet
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Convert a Map to a POJO
...o = mapper.convertValue(map, MyPojo.class);
No need to convert into JSON string or something else; direct conversion does much faster.
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Mismatch Detected for 'RuntimeLibrary'
I downloaded and extracted Crypto++ in C:\cryptopp. I used Visual Studio Express 2012 to build all the projects inside (as instructed in readme), and everything was built successfully. Then I made a test project in some other folder and added cryptolib as a dependency. After that, I added the includ...
How do you embed binary data in XML?
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If you're using .NET, you can convert a binary file directly to a base64 string and stick it inside an XML element.
string base64 = Convert.ToBase64String(File.ReadAllBytes(fileName));
Or, there is a method built right into the XmlWriter object. In my particular case, I had to include Microsoft...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
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Whatever you do, I highly advise against the third option: Returning a string that says "WTF".
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pip install from git repo branch
...ango 1.9 on, Django ships with a file that has a unicode filename. The zip extractor used by pip chokes on that. An easy workaround is to replace .zip with .tar.gz, as the tar extractor works.
– spectras
Jul 3 '16 at 11:56
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Specifying a custom DateTime format when serializing with Json.Net
...y ARE correct, although they are not strictly necessary here. See Literal String Delimiters in the documentation for Custom Date and Time Format Strings. However, the format I quoted as the default format for the IsonDateTimeConverter was taken directly from the Json.Net source code; therefore I a...