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What is a None value?
I have been studying Python, and I read a chapter which describes the None value, but unfortunately this book isn't very clear at some points. I thought that I would find the answer to my question, if I share it there.
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Why is a combiner needed for reduce method that converts type in java 8
...se mapToInt(String::length) over mapToInt(s -> s.length()), not sure if one would be better over the other, but I prefer the former for readability.
– skiwi
Jun 19 '14 at 15:35
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How do I pass an object from one activity to another on Android? [duplicate]
I need to be able to use one object in multiple activities within my app, and it needs to be the same object. What is the best way to do this?
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How to 'git pull' into a branch that is not the current one?
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You've got a worktree you don't want to touch, so use another one. Clone is cheap, it's built for this.
git fetch origin master # nice linear tree
git clone . ../wip -b master # wip's `origin/master` is my `master`
cd ../wip # .
git pull origin origin/master...
Class method differences in Python: bound, unbound and static
...and unbound methods.
Basically, a call to a member function (like method_one), a bound function
a_test.method_one()
is translated to
Test.method_one(a_test)
i.e. a call to an unbound method. Because of that, a call to your version of method_two will fail with a TypeError
>>> a_test...
SQL set values of one column equal to values of another column in the same table
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Sounds like you're working in just one table so something like this:
update your_table
set B = A
where B is null
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How do you fix a bad merge, and replay your good commits onto a fixed merge?
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Please don't use this recipe if your situation is not the one described in the question. This recipe is for fixing a bad merge, and replaying your good commits onto a fixed merge.
Although filter-branch will do what you want, it is quite a complex command and I would probably choos...
How to cast List to List
...pointed. -- Meanwhile, .NET has two separate extension methods for this -- one called .Cast<T>() and one called .OfType<T>(). The former performs a cast on each element (throwing the desired exceptions) while the latter filters out elements that can't be cast (so you would pick one depe...
Should I use single or double colon notation for pseudo-elements?
... hand this is more verbose than necessary; for now, you can stick with the one-colon notation.
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How do I run Redis on Windows?
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Wasn't one click for me. I've run the executable and still not sure how to get it to run
– Trevor de Koekkoek
May 12 '13 at 16:43
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