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How can I pretty-print JSON using Go?
...nswered Sep 26 '13 at 21:17
Alexander BauerAlexander Bauer
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Can I change the root EBS device of my amazon EC2 instance?
.... I spent a while trying to figure out why I couldn't ssh into it anymore, and this was the reason.
– mrooney
Jan 17 '13 at 22:54
16
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Why does C++ need a separate header file?
...ile with the same functions as in the .cpp file. It makes creating classes and refactoring them very difficult, and it adds unnecessary files to the project. And then there is the problem with having to include header files, but having to explicitly check if it has already been included.
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How to add some non-standard font to a website?
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Both Internet Explorer and Firefox re NOT based on Webkit, so it's quite a useless solution in my opinion.
– Casper
Sep 20 '08 at 13:21
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Check for installed packages before running install.packages() [duplicate]
... computers. One of its lines contains the install.packages("xtable") command.
16 Answers
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Create objective-c class instance by name?
...he class exists.
For example, in your .h:
@property Class NameOfClass;
and then in your .m:
id object = [[NameOfClass alloc] init];
If you mistyped the class name or if it doesn't exist, you'll get an error at compile time. Also I think this is cleaner code.
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How to chain scope queries with OR instead of AND?
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and just for safety's sake, it's worth expressing this as Person.where("name = ? OR lastname = ?", 'John', 'Smith')
– CambridgeMike
Nov 9 '11 at 3:55
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Avoid browser popup blockers
I'm developing an OAuth authentication flow purely in JavaScript and I want to show the user the "grant access" window in a popup, but it gets blocked.
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How to remove an element from a list by index
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Use del and specify the index of the element you want to delete:
>>> a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> del a[-1]
>>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8]
Also supports slices:
>>> del a[2:4]
>...
Simple state machine example in C#?
...is simple state diagram:
We have:
4 states (Inactive, Active, Paused, and Exited)
5 types of state transitions (Begin Command, End Command, Pause Command, Resume Command, Exit Command).
You can convert this to C# in a handful of ways, such as performing a switch statement on the current state...