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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...
What is a “web service” in plain English?
... answered Oct 22 '08 at 15:02
64BitBob64BitBob
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ERROR 2006 (HY000): MySQL server has gone away
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max_allowed_packet=64M
Adding this line into my.cnf file solves my problem.
This is useful when the columns have large values, which cause the issues, you can find the explanation here.
On Windows this file is located at: "C:\ProgramData...
Safest way to convert float to integer in python?
...n the operating system and underlying hardware. See en.wikipedia.org/wiki/64-bit_computing#64-bit_data_models. If you are programming with the C-API, python 3 you have to be very careful in what the definition of long and size_t is on your platform. docs.python.org/3/c-api/long.html
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Delete from the current cursor position to a given line number in vi editor
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To add to this, if you want to delete lines 45 through 64, you do :45,64d
– ThinkCode
Sep 6 '13 at 16:54
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Is there a way to check if int is legal enum in C#?
... // Call IsDefined with invalid underlying integral value.
value = 64;
Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value));
// Call IsDefined with string containing member name.
value = "Rodent";
Console.WriteLine("{0}: {1}", value, Enum.IsDef...
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...
How to read a CSV file into a .NET Datatable
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We always used to use the Jet.OLEDB driver, until we started going to 64 bit applications. Microsoft has not and will not release a 64 bit Jet driver. Here's a simple solution we came up with that uses File.ReadAllLines and String.Split to read and parse the CSV file and manually load a DataTab...
How to make Google Chrome JavaScript console persistent?
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at Version 67.0.3396.87 (Official Build) (64-bit)
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How to validate an Email in PHP?
...1\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-z0-9]+(?:-+[a-z0-9]+)*\\.){1,126}){1,}(?:(?:[a-z][a-z0-9]*)|(?:(?:xn--)[a-z0-9]+))(?:-+[a-z0-9]+)*)|(?:\\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\\]]){7,})(?:[a-f0-9]{...