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Pandas - Get first row value of a given column
...ime 1.2
C 12.0
D 25.0
E 12.0
Name: 0, dtype: float64
To select the ith value in the Btime column you could use:
In [30]: df_test['Btime'].iloc[0]
Out[30]: 1.2
There is a difference between df_test['Btime'].iloc[0] (recommended) and df_test.iloc[0]['Btime']:
DataFrame...
PostgreSQL: Drop PostgreSQL database through command line [closed]
...yone: sudo service postgresql restart Then do a: dropdb -h localhost -p 5432 -U "youruser" "testdb" Notice the "" to make sure special characters go in without a hitch.
– unom
Jun 26 '14 at 6:10
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Do the JSON keys have to be surrounded by quotes?
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edited Jun 29 '11 at 6:32
answered Jun 4 '09 at 9:26
cob...
How to .gitignore files recursively
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to get a list of all files that changed between two Git commits?
...lisTim Bellis
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(![]+[])[+[]]… Explain why this works
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kevinji
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answered Nov 13 '10 at 4:50
Christian C. SalvadóChristian C. Sa...
What is a “web service” in plain English?
... answered Oct 22 '08 at 15:02
64BitBob64BitBob
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printf format specifiers for uint32_t and size_t
...me as unsigned long (possibly 64 bits) when it's actually an unsigned int (32 bits). Try using %zu in both cases.
I'm not entirely certain though.
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What's the best way to set a single pixel in an HTML5 canvas?
...tting-canvas-pixel/9 or here https://www.measurethat.net/Benchmarks/Show/1664/1
I recommend testing against browsers you care about for maximum speed. As of July 2017, fillRect() is 5-6× faster on Firefox v54 and Chrome v59 (Win7x64).
Other, sillier alternatives are:
using getImageData()/putIm...
Where is PATH_MAX defined in Linux?
... it is only programmer who use PATH_MAX suck. PATH_MAX is really at least 32k on windows and you really almost never want declare PATH_MAX to be 32k.
– Lothar
Dec 22 '17 at 19:23
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