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Is there a reason for C#'s reuse of the variable in a foreach?
...reaking change scenario though, which is that someone writes code in C# 5, tests it, and then shares it with people who are still using C# 4, who then naively believe it to be correct. Hopefully the number of people affected by such a scenario is small.
– Eric Lippert
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Assign output of a program to a variable using a MS batch file
... above code in a batch file rather than on the command line. Imagine, your test.bat has something like:
for /f %%i in ('c:\cygwin64\bin\date.exe +"%%Y%%m%%d%%H%%M%%S"') do set datetime=%%i
echo %datetime%
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How do I add a tool tip to a span element?
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Yes I just tested it and also wasn't surprised it didn't work .Good old IE! ;)
– SearchForKnowledge
Mar 12 '15 at 14:14
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Are braces necessary in one-line statements in JavaScript?
...ondition)
DoSomething();
turns into the following after it has been tested with different browsers/environments/use cases or new features are added:
if (a != null)
if (condition)
DoSomething();
else
DoSomethingElse();
DoSomethingMore();
else
if (b == null)
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Check for column name in a SqlDataReader object
...the way back in 2006. stackoverflow.com/a/891230/852208. Further without testing, it's possible that this code is actually slower with it's average case checking half of all columns (though still trivial in a db connected app). I would edit this answer to only include the middle paragraph as the ...
Pass Nothing from Javascript to VBScript in IE9
...on getting a better job!)
I don't have access to IE right now, so I can't test this, but what if you tried writing a function like this:
<script type="text/vbscript">
Function CallWithNulls(fn, arg1, arg2, arg3)
If (isNull(arg1)) arg1 = Nothing
If (isNull(arg2)) arg2 = Nothing
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What is the fastest way to compare two sets in Java?
...n this set. But if all elements are present in both sets, it will need to test all of them.
The worst case performance therefore occurs when the two sets are equal but not the same objects. That cost is typically O(N) or O(NlogN) depending on the implementation of this.containsAll(c).
And you ge...
A valid provisioning profile for this executable was not found for debug mode
...cert from both My Certificates and Certificates and then downloading the latest one from the dev centre and installing that (double click on the .cer file)
sorted my problem
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getenv() vs. $_ENV in PHP
...tenv() is a better choice because, as a function, it can be overloaded for testing purposes. Whereas overwriting your $_SERVER or $_ENV variables might interfere with test frameworks and other libraries and ultimately require a lot more work to carry out safely.
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Stripping everything but alphanumeric chars from a string in Python
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I just timed some functions out of curiosity. In these tests I'm removing non-alphanumeric characters from the string string.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
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