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What does the exclamation mark mean in a Haskell declaration?
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319
It's a strictness declaration. Basically, it means that it must be evaluated to what's called "...
XPath OR operator for different nodes
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221
All title nodes with zipcode or book node as parent:
Version 1:
//title[parent::zipcode|parent...
How can I find the version of the Fedora I use?
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11 Answers
11
Active
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Django: How to completely uninstall a Django app?
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152
Django < 1.7 has a handy management command that will give you the necessary SQL to drop a...
PHP array: count or sizeof?
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192
I would use count() if they are the same, as in my experience it is more common, and therefore...
Call a function with argument list in python
...into the rest of the parameters.
So you can do the following:
def wrapper1(func, *args): # with star
func(*args)
def wrapper2(func, args): # without star
func(*args)
def func2(x, y, z):
print x+y+z
wrapper1(func2, 1, 2, 3)
wrapper2(func2, [1, 2, 3])
In wrapper2, the list is passed...
Create table (structure) from existing table
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15 Answers
15
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List comprehension: Returning two (or more) items for each item
...t;> list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
s...
How to remove multiple indexes from a list at the same time? [duplicate]
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answered Jul 3 '12 at 1:08
Ned BatchelderNed Batchelder
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