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Python hashable dicts
...es, it is necessary to have the hash take the values into account. The fastest way to do that is:
class Hashabledict(dict):
def __hash__(self):
return hash((frozenset(self), frozenset(self.itervalues())))
This is quicker than frozenset(self.iteritems()) for two reasons. First, the f...
How can I sort generic list DESC and ASC?
... and I was using this method earlier :-
li.Sort();
li.Reverse();
but my test cases were failing for exceeding time limits, so below solution worked for me:-
li.Sort((a, b) => b.CompareTo(a));
So Ultimately the conclusion is that 2nd way of Sorting list in Descending order is bit faster than...
Preserve colouring after piping grep to grep
... You have to have the same grep pattern twice in your expression. I just tested this on a mac: http://i.imgur.com/BhmwAlF.png
– andersonvom
Feb 26 '15 at 0:44
add a comment
...
Which one will execute faster, if (flag==0) or if (0==flag)?
...
Assuming the processor has a "test if 0" instruction, x == 0 might use it but 0 == x might use a normal compare. I did say it would have to be retarded.
– JeremyP
Jan 7 '11 at 11:08
...
How do I push a local Git branch to master branch in the remote?
...
git checkout master
git pull # to update the state to the latest remote master state
git merge develop # to bring changes to local master from your develop branch
git push origin master # push current HEAD to remote master branch
...
iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?
...to see if it's also mapping ⌥+← to something. If so remove it. You can test if your b is working correctly by quickly pressing esc releasing, then pressing b. That should jump a word to the left. Alternatively, you can map ⌥+← to hex 0x1b 0x42 or 0x1b 0x5b 0x31 0x3b 0x35 0x44. I verified tha...
How to use a custom comparison function in Python 3?
...r function, cmp have 2 parameters, they are different behavior. and I just tested, got error, because of key keyword only pass one parameter, TypeError: customsort() takes exactly 2 positional arguments (1 given)
– YOU
Mar 28 '10 at 5:17
...
What is the best way to concatenate two vectors?
...in turn invalidate AB.
Because every access to an element is preceded by a test (namely, "i
< v1.size()"), VecProxy access time, although constant, is also
a bit slower than that of vectors.
This approach can be generalized to n vectors. I haven't tried, but
it shouldn't be a big deal.
...
CSS performance relative to translateZ(0)
...
I can attest to the fact that -webkit-transform: translate3d(0, 0, 0); will mess with the new position: -webkit-sticky; property. With a left drawer navigation pattern that I was working on, the hardware acceleration I wanted with th...
Hibernate: Automatically creating/updating the db tables based on entity classes
....auto). You will also need the @Table annotation!
@Entity
@Table(name = "test_entity")
public class TestEntity {
}
It has already helped in my case at least 3 times - still cannot remember it ;)
PS. Read the hibernate docs - in most cases You will probably not want to set hibernate.hbm2ddl....