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isset() and empty() - what to use
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145
It depends what you are looking for, if you are just looking to see if it is empty just use emp...
How to detect a Christmas Tree? [closed]
...est point onto an already pre-existing cluster. I set this value to be 0.04 times the size along the diagonal of each image. Since the images vary in size from roughly VGA up to about HD 1080, this type of scale-relative definition is critical.
Another point worth noting is that the DBSCAN algori...
Git - Difference Between 'assume-unchanged' and 'skip-worktree'
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694
You want skip-worktree.
assume-unchanged is designed for cases where it is expensive to check w...
Can someone explain the right way to use SBT?
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4 Answers
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Active
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How do I shuffle an array in Swift?
...s how to shuffle with a fast and uniform algorithm (Fisher-Yates) in Swift 4.2+ and how to add the same feature in the various previous versions of Swift. The naming and behavior for each Swift version matches the mutating and nonmutating sorting methods for that version.
Swift 4.2+
shuffle and sh...
How to pass command line argument to gnuplot?
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answered Sep 8 '12 at 11:49
Jari LaamanenJari Laamanen
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Find integer index of rows with NaN in pandas dataframe
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47
For DataFrame df:
import numpy as np
index = df['b'].index[df['b'].apply(np.isnan)]
will giv...
Is there a difference between x++ and ++x in java?
...mil HEmil H
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How to easily truncate an array with JavaScript?
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There is a slice method
array.slice(0, 4);
Will return the first four elements.
Don't forget to assign it back to your variable if you want to discard the other values.
Note: This is just regular javascript, no need for jquery.
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What is “rvalue reference for *this”?
...te exists. Additionally, this is the important bit for us (same clause):
p4 For non-static member functions, the type of the implicit object parameter is
“lvalue reference to cv X” for functions declared without a ref-qualifier or with the & ref-qualifier
“rvalue reference to cv X” fo...