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What's the difference between hard and soft floating point numbers?
...njaljninjalj
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Why is an int in OCaml only 31 bits?
...al integer. Even with a very compact representation, that's something like 6 Byte for a simple integer.
Also, you cannot pass such an integer object to the CPU to perform fast integer arithmetic. If you want to add two integers, you really only have two pointers, which point to the beginning of the...
The type or namespace name 'Objects' does not exist in the namespace 'System.Data'
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Joshua BeldenJoshua Belden
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pandas GroupBy columns with NaN (missing) values
...g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1).groupby('b').sum()
Out[12]:
a
b
-1 2
4 1
6 3
That said, this feels pretty awful hack... perhaps there should be an option to include NaN in groupby (see this github issue - which uses ...
pandas dataframe columns scaling with sklearn
...inMaxScaler()
>>> dfTest = pd.DataFrame({'A':[14.00,90.20,90.95,96.27,91.21],
'B':[103.02,107.26,110.35,114.23,114.68],
'C':['big','small','big','small','small']})
>>> dfTest[['A', 'B']] = scaler.fit_transform(dfTest[['A', 'B'...
How to properly add cross-site request forgery (CSRF) token using PHP
...ng the CSRF Token
Don't just use == or even ===, use hash_equals() (PHP 5.6+ only, but available to earlier versions with the hash-compat library).
if (!empty($_POST['token'])) {
if (hash_equals($_SESSION['token'], $_POST['token'])) {
// Proceed to process the form data
} else {
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Saving a Numpy array as an image
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edited Aug 1 '16 at 11:45
Green-Man
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answered May 24 '09 at 0:26
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What is the difference between :first-child and :first-of-type?
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BoltClock♦BoltClock
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val-mutable versus var-immutable in Scala
...niel C. SobralDaniel C. Sobral
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Chrome Extension how to send data from content script to popup.html
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answered Nov 16 '13 at 20:51
gkalpakgkalpak
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