大约有 3,200 项符合查询结果（耗时：0.0235秒） [XML]
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...,000 rows
%timeit df["A1"], df["A2"] = calculate(df['a'])
2.65 ms ± 92.4 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
%timeit df["A1"], df["A2"] = zip(*df["a"].apply(calculate))
159 ms ± 5.24 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
60x faster than zip
In gener...
How to grep Git commit diffs or contents for a certain word?
In a Git code repository I want to list all commits that contain a certain word. I tried this
8 Answers
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javascript regex - look behind alternative?
...ust converted this: (?<!barna)(?<!ene)(?<!en)(?<!erne) (?:sin|vår)e?(?:$| (?!egen|egne)) to (?!barna).(?!erne).(?!ene).(?!en).. (?:sin|vår)e?(?:$| (?!egen|egne)) which does the trick for my needs. Just providing this as another "real-world" scenario. See link
– Ei...
What's causing my java.net.SocketException: Connection reset? [duplicate]
... answered Oct 21 '11 at 10:41
PålOliverPålOliver
2,10611 gold badge2020 silver badges2323 bronze badges
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How to get UTF-8 working in Java webapps?
...king in my Java webapp (servlets + JSP, no framework used) to support äöå etc. for regular Finnish text and Cyrillic alphabets like ЦжФ for special cases.
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React.js: Identifying different inputs with one onChange handler
...is.setState({ [e.target.name]: e.target.value });
– XåpplI'-I0llwlg'I -
Oct 28 '15 at 7:17
2
Us...
Copy file or directories recursively in Python
...ed Feb 15 '17 at 11:56
Jean-François Corbett
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answered Jan 3 '10 at 12:35
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Which comment style should I use in batch files?
...n7SP1 with 100000 comment lines).
For a normal usage it's not important (58µs versus 360µs per comment line)
Comments with ::
A :: always executes a line end caret.
:: This is also a comment^
echo This line is also a comment
Labels and also the comment label :: have a special logic in parenth...
What's the point of 'const' in the Haskell Prelude?
...d Sep 14 '11 at 9:25
Jonas DuregårdJonas Duregård
93744 silver badges88 bronze badges
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What does the ??!??! operator do in C?
...if (x || y) { a[i] = '\0'; } looking like if (x öö y) ä aÄiÅ = 'Ö0'; å in the wrong charset.
– Ilmari Karonen
Oct 20 '11 at 13:36
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