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Hidden features of Windows batch files
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How to permanently export a variable in Linux?
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answered Oct 24 '12 at 9:45
AntoineAntoine
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How to handle Handler messages when activity/fragment is paused
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4 Answers
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What's the best UI for entering date of birth? [closed]
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24 Answers
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How to extend an existing JavaScript array with another array, without creating a new array
... Khachaturyan
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answered Sep 3 '09 at 15:27
DzinXDzinX
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How to sort a dataframe by multiple column(s)
...f the example(order) code:
R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A 8 1
3 Hi A 9 1
Edit some 2+ years later: It was just asked how to do this by column index. The answer is to simply pass the desired sorting column(s) to the order() function:
R> dd[orde...
Devise Secret Key was not set
I am developing a Rails 4 app using the Active Admin gem for the administration back end. Active Admin in turn uses Devise for user authentication. Now, when I try to deploy the app using capistrano on the VPS server, I get the below error:
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Change the name of a key in dictionary
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Robert Siemer
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answered Dec 10 '10 at 7:11
moinudinmoinudin
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How does the Brainfuck Hello World actually work?
...value of the cell it points to up to 97 and print it out 2 times.
aa
4. Loops
In BF loop consists of loop begin [ and loop end ]. You can think it's like while in C/C++ where the condition is actual cell value.
Take a look BF program below:
++[]
++ increments actual cell value twice:
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postgresql port confusion 5433 or 5432?
...ice will run on that port.
In PostgreSQL's case it's typical to use port 5432 if it is available. If it isn't, most installers will choose the next free port, usually 5433.
You can see what is actually running using the netstat tool (available on OS X, Windows, and Linux, with command line syntax ...