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Is if(items != null) superfluous before foreach(T item in items)?
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@CodeInChaos: Do you typically find that the speed of enumerating an empty sequence is the performance bottleneck in your program?
– Eric Lippert
Jun 23 '11 at 15:19
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Fix code indentation in Xcode
...evious code maintains its former indentation instead of adjusting automatically.
9 Answers
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Ruby on Rails vs ASP.NET MVC 3 for a .NET Guy? [closed]
... I used a great book to learn a while back, and it would be right up your alley: Rails for .Net Developers
Also, I wrote a post about going from MVC to RoR a while back as well.
As for comparisons, they both have strengths as has been covered, but here are a few that stick out to me:
I reall...
How do I find a stored procedure containing ?
... A million times what @PeteT said. This 4000 character limit really bit me a few years ago.
– Vivian River
Mar 31 '15 at 17:40
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Is there more to an interface than having the correct methods
...OtherKindOfBox();
Once you get used to it, you'll find it's a great (actually essential) way to work.
Another reason is, for example, if you want to create a list of boxes and perform some operation on each one, but you want the list to contain different kinds of boxes. On each box you could do:
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How to understand nil vs. empty vs. blank in Ruby
...s the negation of .blank?.
Array gotcha: blank? will return false even if all elements of an array are blank. To determine blankness in this case, use all? with blank?, for example:
[ nil, '' ].blank? == false
[ nil, '' ].all? &:blank? == true
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Combine two columns of text in pandas dataframe
...ese columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
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Android Studio - How to Change Android SDK Path
... You guys are mistaken. Android Studio isn't organized like ADT Eclipse at all. And this accepted answer leads to the exact same place as DheeB's answer (which brings you to a place that says: Android SDK location: This location will be used for new projects, and for existing projects that do not ha...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
...to mention, has tenuous support for C extensions. It has support, but typically at slower-than-Python speeds and it's iffy at best. Hence a lot of modules simply require CPython. PyPy doesn't support numpy PyPy now supports numpy. Some extensions are still not supported (Pandas, SciPy, etc.), take a...
Select elements by attribute
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@rinogo: actually all you need is if($(":checkbox[myattr]").length) . The () after length is not necessary, neither is the > 0, 0 evaluates to false in equality tests that do not require strict equality (both value and type).
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