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enum - getting value of enum on string conversion
...bject. Use the .value attribute if you wanted just to print that:
print(D.x.value)
See the Programmatic access to enumeration members and their attributes section:
If you have an enum member and need its name or value:
>>>
>>> member = Color.red
>>> member.name
're...
How to join (merge) data frames (inner, outer, left, right)
...its optional parameters:
Inner join: merge(df1, df2) will work for these examples because R automatically joins the frames by common variable names, but you would most likely want to specify merge(df1, df2, by = "CustomerId") to make sure that you were matching on only the fields you desired. You ...
How to replace a hash key with another key
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At last! This is exactly what I searched!
– TiSer
Sep 30 '16 at 8:23
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How to delete files older than X hours
...wered Oct 30 '08 at 8:39
Paul DixonPaul Dixon
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Does Python optimize tail recursion?
...ng to transform it like that - just: from operator import add; reduce(add, xrange(n + 1), csum) ?
– Jon Clements♦
Nov 27 '12 at 20:10
38
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Extract subset of key-value pairs from Python dictionary object?
...u're using Python 3, and you only want keys in the new dict that actually exist in the original one, you can use the fact to view objects implement some set operations:
{k: bigdict[k] for k in bigdict.keys() & {'l', 'm', 'n'}}
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Quickest way to convert a base 10 number to any base in .NET?
...rt a number to its equivalent string representation in a specified base.
Example:
string binary = Convert.ToString(5, 2); // convert 5 to its binary representation
Console.WriteLine(binary); // prints 101
However, as pointed out by the comments, Convert.ToString only supports the fo...
Most efficient method to groupby on an array of objects
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Removing “NUL” characters
...findreplace-of-nul-objects-in-notepad.html
Basically you need to replace \x00 characters with regular expressions
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Omit rows containing specific column of NA
...ete.cases function and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data[completeVec, ])
}
completeFun(DF, "y")
# x y z
# 1...