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How can I start PostgreSQL server on Mac OS X?
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The Homebrew package manager includes launchctl plists to start automatically. For more information, run brew info postgres.
Start manually
pg_ctl -D /usr/local/var/postgres start
Stop manually
pg_ctl -D /usr/local/var/postgres stop
Start automatically
"To have launchd start postgresql now and res...
Can't start Eclipse - Java was started but returned exit code=13
...ng Eclipse. I ran into this problem when trying to run Eclipse, having installed version 4.2 only minutes ago.
44 Answers
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Passing functions with arguments to another function in Python?
... y):
return x+y
# declare partial function
def addPartial(x):
def _wrapper(y):
return add(x, y)
return _wrapper
# run example
def main():
f = addPartial(3)
result = runOp(f, 1) # is 4
Use partial from functools
This is almost identical to lambda shown above. Then why...
How to install Hibernate Tools in Eclipse?
What is the proper way to install Hibernate Tools in Eclipse as a plugin?
The Hibernate site doesn't really give any instructions.
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Select mySQL based only on month and year
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Is this true for EXTRACT(YEAR_MONTH FROM Date)?
– cmbuckley
Feb 1 '12 at 23:59
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How to get the raw value an field?
...urself.
The W3 also has the same specs and adds:
User agents must not allow the user to set the value to a non-empty
string that is not a valid floating-point number.
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AttributeError: 'module' object has no attribute 'urlopen'
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A Python 2+3 compatible solution is:
import sys
if sys.version_info[0] == 3:
from urllib.request import urlopen
else:
# Not Python 3 - today, it is most likely to be Python 2
# But note that this might need an update when Python 4
# might be around one day
from urlli...
Is it possible to figure out the parameter type and return type of a lambda?
...Andry that's a fundamental problem with function objects that have (potentially) multiple overloads of operator() not with this implementation. auto is not a type, so it can't ever be the answer to traits::template arg<0>::type
– Caleth
Jan 16 '18 at 12:1...
How to save an image to localStorage and display it on the next page?
So, basically, I need to upload a single image, save it to localStorage, then display it on the next page.
7 Answers
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Generate random numbers with a given (numerical) distribution
...> choices(population, weights)
4
The optional keyword-only argument k allows one to request more than one sample at once. This is valuable because there's some preparatory work that random.choices has to do every time it's called, prior to generating any samples; by generating many samples at o...