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Remap values in pandas column with a dict
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373
You can use .replace. For example:
>>> df = pd.DataFrame({'col2': {0: 'a', 1: 2, 2:...
How does RegexOptions.Compiled work?
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304
RegexOptions.Compiled instructs the regular expression engine to compile the regular expressio...
Tricky Google interview question
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answered Mar 31 '11 at 21:35
user515430user515430
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How does the socket API accept() function work?
...ients, 10.0.0.1 and 10.0.0.2.
10.0.0.1 opens a connection on local port 1234 and connects to the server. Now the server has one socket identified as follows:
10.0.0.1:1234 - 192.168.1.1:80
Now 10.0.0.2 opens a connection on local port 5678 and connects to the server. Now the server has two s...
Convert a float64 to an int in Go
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package main
import "fmt"
func main() {
var x float64 = 5.7
var y int = int(x)
fmt.Println...
Why does one hot encoding improve machine learning performance?
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3 Answers
3
Active
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List comprehension vs map
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$ python -mtimeit -s'xs=range(10)' 'map(hex, xs)'
100000 loops, best of 3: 4.86 usec per loop
$ python -mtimeit -s'xs=range(10)' '[hex(x) for x in xs]'
100000 loops, best of 3: 5.58 usec per loop
An example of how performance comparison gets completely reversed when map needs a lambda:
$ pytho...
Python 3: UnboundLocalError: local variable referenced before assignment [duplicate]
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Jakob BowyerJakob Bowyer
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What is sr-only in Bootstrap 3?
... community wiki
8 revs, 6 users 73%anon
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