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Datatype for storing ip address in SQL Server
...even an INT32/INT(4), the numeric textual form that we all know and love (255.255.255.255) being just the display conversion of its binary content).
If you do it this way, you will want functions to convert to and from the textual-display format:
Here's how to convert the textual display form to b...
What is a proper naming convention for MySQL FKs?
...aniel VassalloDaniel Vassallo
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NSObject +load and +initialize - What do they do?
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185
The load message
The runtime sends the load message to each class object, very soon after the c...
What is the difference between ELF files and bin files?
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95
A Bin file is a pure binary file with no memory fix-ups or relocations, more than likely it has ...
How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting
...og x, just fit y against (log x).
>>> x = numpy.array([1, 7, 20, 50, 79])
>>> y = numpy.array([10, 19, 30, 35, 51])
>>> numpy.polyfit(numpy.log(x), y, 1)
array([ 8.46295607, 6.61867463])
# y ≈ 8.46 log(x) + 6.62
For fitting y = AeBx, take the logarithm of both side...
get list of pandas dataframe columns based on data type
...ertain type, you can use groupby:
>>> df = pd.DataFrame([[1, 2.3456, 'c', 'd', 78]], columns=list("ABCDE"))
>>> df
A B C D E
0 1 2.3456 c d 78
[1 rows x 5 columns]
>>> df.dtypes
A int64
B float64
C object
D object
E int64
dtype: obj...
How to sort an IEnumerable
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The same way you'd sort any other enumerable:
var result = myEnumerable.OrderBy(s => s);
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C#: Assign same value to multiple variables in single statement
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265
It's as simple as:
num1 = num2 = 5;
When using an object property instead of variable, it is ...
Summarizing multiple columns with dplyr? [duplicate]
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How do I make a fully statically linked .exe with Visual Studio Express 2005?
...+ environment is the free and largely excellent Microsoft Visual Studio 2005 Express edition. From time to time I have sent release .exe files to other people with pleasing results. However recently I made the disturbing discovery that the pleasing results were based on more luck that I would like. ...