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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...
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...
How to get client's IP address using JavaScript?
I need to somehow retrieve the client's IP address using JavaScript; no server side code, not even SSI.
50 Answers
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Get local IP address
In the internet there are several places that show you how to get an IP address. And a lot of them look like this example:
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How to determine a user's IP address in node
How can I determine the IP address of a given request from within a controller? For example (in express):
19 Answers
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How to get the client IP address in PHP [duplicate]
How can I get the client IP address using PHP?
30 Answers
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Finding local IP addresses using Python's stdlib
How can I find local IP addresses (i.e. 192.168.x.x or 10.0.x.x) in Python platform independently and using only the standard library?
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Which terminal command to get just IP address and nothing else?
I'm trying to use just the IP address (inet) as a parameter in a script I wrote.
28 Answers
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Is it possible to have SSL certificate for IP address, not domain name?
...o simply try and order one with the provider of your choice, and enter the IP address instead of a domain during the ordering process.
However, running a site on an IP address to avoid the DNS lookup sounds awfully like unnecessary micro-optimization to me. You will save a few milliseconds at best,...
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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