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Lambda function in list comprehensions
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271
The first one creates a single lambda function and calls it ten times.
The second one doesn't ca...
Deleting array elements in JavaScript - delete vs splice
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1713
delete will delete the object property, but will not reindex the array or update its length. ...
Python OpenCV2 (cv2) wrapper to get image size?
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213
cv2 uses numpy for manipulating images, so the proper and best way to get the size of an image ...
Boolean operators && and ||
...an return a vector, like this:
((-2:2) >= 0) & ((-2:2) <= 0)
# [1] FALSE FALSE TRUE FALSE FALSE
The longer form evaluates left to right examining only the first element of each vector, so the above gives
((-2:2) >= 0) && ((-2:2) <= 0)
# [1] FALSE
As the help page says...
Check whether a string contains a substring
...ns substring you can use the index function:
if (index($str, $substr) != -1) {
print "$str contains $substr\n";
}
It will return the position of the first occurrence of $substr in $str, or -1 if the substring is not found.
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plot with custom text for x axis points
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196
You can manually set xticks (and yticks) using pyplot.xticks:
import matplotlib.pyplot as plt...
How to cherry pick from 1 branch to another
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1 Answer
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src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
...t-devel & libxml2-devel using
sudo apt-get install libxml2-dev libxslt1-dev
After installing follow the above one
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How do I search within an array of hashes by hash values in ruby?
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Dave Powers
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answered Feb 11 '10 at 14:11
Jordan RunningJo...
Parallel.ForEach vs Task.Factory.StartNew
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answered Feb 15 '11 at 20:37
Reed CopseyReed Copsey
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