I’ve lost half an hour wondering why my icons were not displayed beside the menu labels.
In the end I found the solution:
gconftool-2 --type bool --set /desktop/gnome/interface/menus_have_icons
Archive for the ‘hacks’ Category
Lorem Ipsum
Thursday, February 4th, 2010#!/usr/bin/env bash cat << EOF Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. EOF
Copy it into a file, and make it executable! Enjoy!
svn-tools: mysvn
Monday, January 11th, 2010Scenario: subversion repository installed on a home-server. Sometimes you need to interact with it from the L.A.N. and sometimes from internet.
This script other then being a wrapper for svn, checks whether the working copy needs to be relocated or not before the operations.
#!/usr/bin/env bash
GATEWAY_IP=192.168.0.254
GATEWAY_MAC=00:14:6c:ab:d2:ca
REPO_LOCAL=192.168.0.4
REPO_REMOTE=code.matteolandi.net
arp -a | grep $GATEWAY_MAC > /dev/null
if [ $? -eq 0 ]; then
source=$REPO_REMOTE
destination=$REPO_LOCAL
else
source=$REPO_LOCAL
destination=$REPO_REMOTE
fi
url_before=$(svn info | grep URL | cut -d ' ' -f 2)
url_after=${url_before/$source/$destination}
if [ "$url_before" != "$url_after" ]; then
echo "Relocating ${url_before} -> ${url_after}"
svn switch --relocate $url_before $url_after
if [ $? -ne 0 ]; then
exit 1
fi
fi
svn $@
I know you could create a new entry inside /etc/hosts and use it depending on the situation, but easy solutions are not my best!
Obviously you will find it inside the hacks/svn-tools repository.
svn-tools: svn-feed update
Monday, January 4th, 2010Few changes regarding the script for the creation of the rss feeds of the commits. Indeed, I decided to create a new one from scratch using python. With this you will be able both to update the feeds and create them from the origins of your repositories.
You can find the tool inside the hacks repository.
Python: Generate fake B.S.O.D.
Friday, November 27th, 2009
Python: for .. else
Saturday, September 12th, 2009
r = [1, 3, 5, 11, 55, 89]
for elem in r:
if elem == 15:
print 'Found an element equal to 15'
break
else:
print 'Given array does not contain any elements equal to 15'
Dynamic Programming: Maximum Subarray Sum
Monday, September 7th, 2009Let’s say we are given an array of integers. What (contiguous) subarray has the largest sum? For example, if our array is [1, 2, -5, 4, 7, -2] then the subarray with the largest sum is [4, 7] with a sum of 11.
# read the array from stdin
vect = map(int, raw_input().split(' '))
# bounds of optimal subarray
(j, k) = (0, 1)
# left bound using for summing elements
l = 0
# sum of the elements of the optimal subarray
best = vect[0]
# sum of the elements from l to current position
sum = vect[0]
for i in xrange(1, len(vect)):
sum += vect[i]
if sum < 0: # selected subarray is not convenient
l = i + 1
sum = 0
elif sum > best:
best += vect[i]
(j, k) = (l, i)
print vect[j:k + 1]
[ source: 20bits.com ]
Python: double for loop statement
Sunday, September 6th, 2009Imagine you have a N x M matrix and you need to loop over each element of it.The first thing coming into my mind was to use a double for loop such as:
# ...
for i in xrange(N):
for j in xrange(M):
# do some action with element (i, j)
# ...
Now imagine to put this double-for statement inside a single-for one because you need to repeat the same action, let’s say, T times:
# ...
for t in xrange(T):
for i in xrange(N):
for j in xrange(M):
# do some action with element (i, j)
# ...
Wait a moment: is all i have written necessary? Why should i need to generate all the M elements every-time? Here is a pretty solution:
def Cross(a, b):
for i in a:
for j in b:
yield (i, j)
# ...
for t in xrange(T):
for (i, j) in Cross(xrange(N), xrange(M)):
# do some action with element (i, j)
# ...
[ source: Google Code Jam ]
Update: hacks repository
Tuesday, July 28th, 2009I decided to move the svn-tools repository inside hacks.
hacks repository
Thursday, July 9th, 2009I decided to create a repository containing the stuff i published without being part of a standalone repository; so this would be the shelter for scripts like pmv, rotating-cube, word-challenge-hacked ecc. ecc.
The name of the repository is hacks.