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//string.erase(std::remove_if(string.begin(),string.end(),&condition),string.end())

#include <algorithm>
#include <string>

bool condition(char c)
{
    return c==' '; //simple example
}

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#example, will evalute and return the command inside the backticks `` to arguement
echo `pkg-config --cflags --libs gtk+-2.0`
#general
command `inner_command`

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from hashlib import sha1
import numpy
arr=numpy.zeros((256,256,4))
sha1(arr)

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A=sym('[a b 0;c d 0;0 0 1]')
A*[1 0 0]'

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sudo apt-get purge nvidia*
#remove xorg.conf
sudo apt-get --reinstall xserver-xorg-core libgl1-mesa-glx:i386 libgl1-mesa-glx:amd64 libgl1-mesa-dri:i386 libgl1-mesa-dri:amd64
sudo dpkg-reconfigure xserver-xorg
sudo reboot
sudo apt-get install nvidia-current
#if this doesn't work
sudo apt-get install linux-headers-generic-pae

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nvidia-smi -a | grep Used

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:%!xxd #set
:%!xxd -r #unset

Stream vim’s buffer through the external program ‘xxd’

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def int2bits(i,n,zero_element=0,one_element=1):
    return list((zero_element,one_element)[i>>j & 1] for j in xrange(n-1,-1,-1))

for i in range(16):
    print int2bits(i,4)

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def maplist(a,indices):
    return map(lambda i:operator.getitem(a,i),indices)

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dozsmatrix=dict(map(lambda a:(a,filter(lambda b:a*b==Zero,R)),R))
groupofunit=dict(map(lambda a:(a,filter(lambda b:a*b==e,Rstar)),Rstar))