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Remove background drawable programmatically in Android
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edited Nov 14 '14 at 8:06
answered Jul 26 '11 at 7:25
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Approximate cost to access various caches and main memory?
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local L1 CACHE hit, ~4 cycles ( 2.1 - 1.2 ns )
local L2 CACHE hit, ~10 cycles ( 5.3 - 3.0 ns )
local L3 CACHE hit, line unshared ~40 cycles ( 21.4 - 12.0 ns )
local L3 CACHE hit, shared line in ...
How to get number of entries in a Lua table?
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answered Apr 24 '10 at 19:14
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How do you use “
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function(x) x ^ exponent
}
square <- power(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...
How to keep index when using pandas merge
...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.
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Maximum length of the textual representation of an IPv6 address?
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45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups ca...
What is the minimum I have to do to create an RPM file?
... in /usr/bin called tobinprog :
1. create your rpm build env for RPM < 4.6,4.7
mkdir -p ~/rpmbuild/{RPMS,SRPMS,BUILD,SOURCES,SPECS,tmp}
cat <<EOF >~/.rpmmacros
%_topdir %(echo $HOME)/rpmbuild
%_tmppath %{_topdir}/tmp
EOF
cd ~/rpmbuild
2. create the tarball of your project
mkdir...
Moving average or running mean
...oop, 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 here...
How to delete every other line in Vim?
...her line from a Vim buffer, starting with the second one, i.e., lines 2, 4, 6, etc. For example, if the buffer’s contents is:
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class method generates “TypeError: … got multiple values for keyword argument …”
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edited Apr 30 '14 at 1:34
answered Sep 23 '13 at 0:08
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