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Is it pythonic to import inside functions?
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I've broken this rule before for modules that are self-testing. That is, they are normally just used for support, but I define a main for them so that if you run them by themselves you can test their functionality. In that case I sometimes import getopt and cmd just in main, b...
Using 'return' in a Ruby block
... * 7 }
value=42
=> nil
return always returns from method, but if you test this snippet in irb you don't have method, that's why you have LocalJumpError
break returns value from block and ends its call. If your block was called by yield or .call, then break breaks from this iterator too
next re...
How to check if variable is string with python 2 and 3 compatibility
...rror:
def isstr(s):
return isinstance(s, str)
The try/except test is done once, and then defines a function that always works and is as fast as possible.
EDIT: Actually, we don't even need to call isinstance(); we just need to evaluate basestring and see if we get a NameError:
try:
...
Bash tool to get nth line from a file
...probably taken ~12 minutes.
mapfile
I have bash 3.1 and therefore cannot test the mapfile solution.
Conclusion
It looks like, for the most part, it's difficult to improve upon the head tail solution. At best the sed solution provides a ~3% increase in efficiency.
(percentages calculated with th...
How can I get the ID of an element using jQuery?
...
The jQuery way:
$('#test').attr('id')
In your example:
$(document).ready(function() {
console.log($('#test').attr('id'));
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<...
Is it possible to use JS to open an HTML select to show its option list? [duplicate]
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This works on latest Chromium-based Opera too.
– NoOne
Apr 25 '15 at 16:22
23
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Can a CSV file have a comment?
...ing the file with a FOR command in a batch file a semicolon works (;)
REM test.bat contents
for /F "tokens=1-3 delims=," %%a in (test.csv) do @Echo %%a, %%b, %%c
;test.csv contents (this line is a comment)
;1,ignore this line,no it shouldn't
2,parse this line,yes it should!
;3,ignore this l...
How to overwrite the previous print to stdout in python?
... erasing prior output on that line, for instance: if your first loop print testing and your second loop print test the output after the second pass will still be testing - now I see that @Nagasaki45 pointed this out
– Eric Uldall
Jun 24 '15 at 21:35
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软件测试中的性能测试、负载测试、压力测试 - 更多技术 - 清泛网 - 专注C/C...
...试可以包括不同的测试类型，例如：性能测试(Performance Test)、负载测试(Load Test)和压力测试(Stress Test)。这三种效率测试类型，不仅在具体定义上面有不同的侧重点，同时相互之间又是密切关联的。
1)性能测试
性能测试主要评价...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
.../servlet/* instead. See also Servlet and path parameters like /xyz/{value}/test, how to map in web.xml?
@WebServlet works only on Servlet 3.0 or newer
In order to use @WebServlet, you only need to make sure that your web.xml file, if any (it's optional since Servlet 3.0), is declared conform Servl...