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add a string prefix to each value in a string column using Pandas
...ame({'col':['a', 0]*200000})
%timeit df['col'].apply(lambda x: f"str{x}")
117 ms ± 451 µs per loop (mean ± std. dev. of 7 runs, 10 loops each)
%timeit 'str' + df['col'].astype(str)
112 ms ± 1.04 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
Using format, however, is indeed far slo...
Adding a new array element to a JSON object
...Paul S.Paul S.
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Using Rails 3.1 assets pipeline to conditionally use certain css
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answered Sep 1 '11 at 16:25
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How to show popup message like in Stack Overflow
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answered Mar 18 '09 at 17:13
Paolo BergantinoPaolo Bergantino
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Show AlertDialog in any position of the screen
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answered May 18 '11 at 20:56
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Example of multipart/form-data
...efox sent:
POST / HTTP/1.1
Host: localhost:8000
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:29.0) Gecko/20100101 Firefox/29.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: __atuvc=34%7C7; perma...
Async/Await vs Threads
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Async/await is a quick way to run some code on the main application thread with the advantage that the code can suspend itself when it has no work to do and return focus to the main thread, "wake up" on the mai...
C# Convert List to Dictionary
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answered Jul 20 '12 at 14:11
dasblinkenlightdasblinkenlight
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What does “Git push non-fast-forward updates were rejected” mean?
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