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How do you use “
...ower(2)
square(2) # -> [1] 4
square(4) # -> [1] 16
cube <- power(3)
cube(2) # -> [1] 8
cube(4) # -> [1] 64
The ability to manage variables at two levels also makes it possible to maintain the state across function invocations by allowing a function to modify variables in the enviro...
What is the minimum I have to do to create an RPM file?
...rog-1.0/etc/toybinprog/
tar -zcvf toybinprog-1.0.tar.gz toybinprog-1.0/
3. Copy to the sources dir
cp toybinprog-1.0.tar.gz SOURCES/
cat <<EOF > SPECS/toybinprog.spec
# Don't try fancy stuff like debuginfo, which is useless on binary-only
# packages. Don't strip binary too
# Be sure bu...
Maximum length of the textual representation of an IPv6 address?
...
631
45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
...
Moving average or running mean
...e loop, without dependencies, the code below works great.
mylist = [1, 2, 3, 4, 5, 6, 7]
N = 3
cumsum, moving_aves = [0], []
for i, x in enumerate(mylist, 1):
cumsum.append(cumsum[i-1] + x)
if i>=N:
moving_ave = (cumsum[i] - cumsum[i-N])/N
#can do stuff with moving_ave h...
How to keep index when using pandas merge
...merge_on col2
index
a 1 1 1
b 2 3 2
c 3 4 NaN
Note that for some left merge operations, you may end up with more rows than in a when there are multiple matches between a and b. In this case, you may need to drop duplicates.
...
How to delete every other line in Vim?
...
ruirui
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...
class method generates “TypeError: … got multiple values for keyword argument …”
...ng")
print
print myfoo
You'll output like:
<__main__.foo object at 0x321c290>
a thong is something
<__main__.foo object at 0x321c290>
You can see that 'thing' has been assigned a reference to the instance 'myfoo' of the class 'foo'. This section of the docs explains how function ar...
Implode an array with JavaScript?
...
John
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answered Nov 10 '10 at 17:03
jon_darkstarjon_darkstar
14.8...
Copy a table from one database to another in Postgres
...
326
Extract the table and pipe it directly to the target database:
pg_dump -t table_to_copy sourc...
How to use `subprocess` command with pipes
...
3
@MakisH You're looking at string.find, which has been deprecated in favor of str.find (i.e., the method find on str objects).
...