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Can't find the 'libpq-fe.h header when trying to install pg gem
I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error:
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Understanding repr( ) function in Python
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Naseer Mohammad
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answered Oct 16 '11 at 12:22
ovgolovinovgolovin
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Linear Regression and group by in R
...e ~ year | state, data = d)
Coefficients:
(Intercept) year
CA -1.34420990 0.17139963
NY 0.00196176 -0.01852429
Degrees of freedom: 20 total; 16 residual
Residual standard error: 0.8201316
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How to call a Parent Class's method from Child Class in Python?
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def baz(self, arg):
return super().baz(arg)
For python < 3, use:
class Foo(Bar):
def baz(self, arg):
return super(Foo, self).baz(arg)
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How to use mod operator in bash?
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dreftymac
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answered Apr 16 '11 at 18:24
Mark LongairMark...
Split string in Lua?
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Adrian Mole
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answered Sep 30 '11 at 19:26
user973713user973713...
How do you delete an ActiveRecord object?
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Qortex
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answered Nov 14 '10 at 13:41
Marek SapotaMarek Sa...
What is the difference between “Include Directories” and “Additional Include Directories”
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3 Answers
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How to handle more than 10 parameters in shell
...ce.Paused until further notice.
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How random is JavaScript's Math.random?
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183
Given numbers between 1 and 100.
9 have 1 digit (1-9)
90 have 2 digits (10-99)
1 has 3 digits...