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String formatting named parameters?
...
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
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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...
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...
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...
Size of Matrix OpenCV
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241
cv:Mat mat;
int rows = mat.rows;
int cols = mat.cols;
cv::Size s = mat.size();
rows = s.heigh...
“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...
How many characters can a Java String have?
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244
You should be able to get a String of length
Integer.MAX_VALUE always 2,147,483,647 (231 - ...
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...
Is there an easy way to pickle a python function (or otherwise serialize its code)?
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120
You could serialise the function bytecode and then reconstruct it on the caller. The marshal m...
Bulk Insertion in Laravel using eloquent ORM
...array('name'=>'Coder 1', 'rep'=>'4096'),
array('name'=>'Coder 2', 'rep'=>'2048'),
//...
);
Coder::insert($data);
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