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What does “abstract over” mean?
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In algebra, as in everyday concept formation, abstractions are formed by grouping things by so...
How do I provide JVM arguments to VisualVM?
I'm using VisualVM from JDK 1.6.0_26 to profile a Java webapp running under Tomcat, but VisualVM often tells me that it doesn't have enough memory to take a snapshot, and to use the -Xmx switch to provide more memory to Netbeans. The problem is, I'm running VisualVM outside of Netbeans, so how can I...
Swift - Convert to absolute value
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The standard abs() function works great here:
let c = -8
print(abs(c))
// 8
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How do I draw a grid onto a plot in Python?
...plot using pylab in Python and now I would like to superimpose a grid of 10x10 onto the scatter plot. How do I do that?
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How do I check if a string is valid JSON in Python?
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edited Aug 18 '17 at 17:01
Neil
19.3k1313 gold badges4646 silver badges6565 bronze badges
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How to access pandas groupby dataframe by key
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198
You can use the get_group method:
In [21]: gb.get_group('foo')
Out[21]:
A B C...
How to get the class of the clicked element?
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edited Oct 11 '13 at 10:41
answered Jun 8 '09 at 10:07
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Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
... [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
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What does “Splats” mean in the CoffeeScript tutorial?
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199
The term "splat operator" comes from Ruby, where the * character (sometimes called the "splat"...