大约有 3,000 项符合查询结果（耗时：0.0120秒） [XML]
PostgreSQL Crosstab Query
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@JohnBarça: A simple case like this can easily be solved with CASE statements. However, this gets unwieldy very quickly with more attributes and / or other data types than just integers. As an aside: this form uses the aggregate fun...
Sorting arrays in NumPy by column
... per loop
%timeit table[table[:,9].argsort()]
10000 loops, best of 3: 180 µs per loop
import pandas as pd
df = pd.DataFrame(table)
%timeit df.sort_values(9, ascending=True)
1000 loops, best of 3: 400 µs per loop
So, it looks like indexing with argsort is the quickest method so far...
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Does Spring @Transactional attribute work on a private method?
...ered Dec 9 '10 at 9:00
Juha SyrjäläJuha Syrjälä
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Can you use reflection to find the name of the currently executing method?
...swered Sep 4 '08 at 16:52
Lars MæhlumLars Mæhlum
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pyplot axes labels for subplots
...bal plotting parameters include a (visible) grid.
– Næreen
Oct 17 '17 at 17:31
3
It seems that t...
How can I set the request header for curl?
...ered Nov 18 '10 at 7:27
Mads MobækMads Mobæk
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Extracting extension from filename in Python
Is there a function to extract the extension from a filename?
24 Answers
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Convert Unicode to ASCII without errors in Python
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>>> u'aあä'.encode('ascii', 'ignore')
'a'
Decode the string you get back, using either the charset in the the appropriate meta tag in the response or in the Content-Type header, then encode.
The method encode(encoding, errors) acc...
Sum a list of numbers in Python
... sum(i for i in a) is just redundant.
– Jean-François Fabre♦
Apr 18 '18 at 13:37
7
sum(Dec...
Javascript Shorthand for getElementById
..., in my benchmark it's about three times as slow as a regular function. 0.4µs * 3 = 1.2µs
– Robert
Jun 20 '11 at 15:58
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