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Why are elementwise additions much faster in separate loops than in a combined loop?
...rmance isn't completely uniform. Accessing 4-ways is still slower than say 2-ways.
EDIT: It does in fact look like you are allocating all the arrays separately.
Usually when such large allocations are requested, the allocator will request fresh pages from the OS. Therefore, there is a high chance th...
Overriding a Rails default_scope
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152
Short answer: Do not use default_scope unless you really have to. You'll probably be better off...
Try-finally block prevents StackOverflowError
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332
It doesn't run forever. Each stack overflow causes the code to move to the finally block. The pr...
“x not in y” or “not x in y”
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112
They always give the same result.
In fact, not 'ham' in 'spam and eggs' appears to be special c...
Image inside div has extra space below the image
...y dog <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/VangoghStarry-night2.jpg/300px-VangoghStarry-night2.jpg" alt="">
</div>
<div id="align-middle">
<h1>vertical-align: middle</h1>
The quick brown fox jumps over the lazy dog <img src="htt...
String formatting named parameters?
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In Python 2.6+ and Python 3, you might choose to use the newer string formatting method.
print('<a href="{0}">{0}</a>'.format(my_url))
which saves you from repeating the argument, or
print('<a href="{url}">{url}&l...
Drop columns whose name contains a specific string from pandas DataFrame
...
import pandas as pd
import numpy as np
array=np.random.random((2,4))
df=pd.DataFrame(array, columns=('Test1', 'toto', 'test2', 'riri'))
print df
Test1 toto test2 riri
0 0.923249 0.572528 0.845464 0.144891
1 0.020438 0.332540 0.144455 0.741412
cols = [c for...
What is the precise meaning of “ours” and “theirs” in git?
...nstance, instead of the above, you might do:
git checkout ours
git merge 1234567
where you're merging by raw commit-ID. Worse, you can even do this:
git checkout 7777777 # detach HEAD
git merge 1234567 # do a test merge
in which case there are no branch names involved!
I think it's ...
Twitter's typeahead.js suggestions are not styled (have no border, transparent background, etc.)
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213
So looking into the docs I now see:
By default, the dropdown menu created by typeahead.js ...