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How to redirect output of an already running process [duplicate]
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See Redirecting Output from a Running Process.
Firstly I run the command cat > foo1 in ...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
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“Too many values to unpack” Exception
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That exception means that you are trying to unpack a tuple, but the tuple has too many values ...
Error: Could not create the Java Virtual Machine Mac OSX Mavericks
I just installed the latest Java SDK 7-67 from Oracle on the Mac 10.9.4. I then ran the command java -v in Terminal and I get this message:
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bool operator ++ and --
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It comes from the history of using integer values as booleans.
If x is an int, but I am using it...
How to convert a negative number to positive?
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>>> n = -42
>>> -n # if you know n is negative
42
>>> abs(n) ...
Django - what is the difference between render(), render_to_response() and direct_to_template()?
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https://docs.djangoproject.com/en/1.8/topics/http/shortcuts/#render
render(request, template[...
Use dynamic variable names in JavaScript
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.NET - How can you split a “caps” delimited string into an array?
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R - Concatenate two dataframes?
...ine adds column b to data frame b.
Results
> a <- data.frame(a=c(0,1,2), b=c(3,4,5), c=c(6,7,8))
> a
a b c
1 0 3 6
2 1 4 7
3 2 5 8
> b <- data.frame(a=c(9,10,11), c=c(12,13,14))
> b
a c
1 9 12
2 10 13
3 11 14
> b$b <- NA
> b
a c b
1 9 12 NA
2 10 13 NA
3 11 1...