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GroupBy pandas DataFrame and select most common value
...pd.Series.mode)
5.56 ms ± 343 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
2.76 ms ± 387 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
Dealing with Multiple Modes
Series.mode also does a good job when there are multiple modes:
source2 = source.append(
pd.Serie...
How to map calculated properties with JPA and Hibernate
...n this article:
@Formula(
"round(" +
" (interestRate::numeric / 100) * " +
" cents * " +
" date_part('month', age(now(), createdOn)" +
") " +
"/ 12) " +
"/ 100::numeric")
private double interestDollars;
...
Return array in a function
...on plain C arrays and many other types of collection, for example
int arr[100];
int *foo = fillarr(arr, arr+100);
Which now looks an awful lot like the plain pointer examples given elsewhere in this question.
share
...
String output: format or concat in C#?
...ided the result by some iterations was wrong. See what happens if you have 1000 milliseconds and 100 milliseconds. In both situations, you will get 0 ms after dividing it by 1000000.
Stopwatch s = new Stopwatch();
var p = new { FirstName = "Bill", LastName = "Gates" };
int n = 1000000;
long fElap...
Performing Inserts and Updates with Dapper
...o, refer to https://msdn.microsoft.com/en-us/library/vstudio/dd456872(v=vs.100).aspx. </param>
/// <typeparam name="TModel"></typeparam>
/// <param name="model">The model object containing all the values that passes as Stored Procedure's parameter.</param&g...
Current time formatting with Javascript
...function() {
if ((nYear&3)!==0) return false;
return nYear%100!==0 || nYear%400===0;
},
getThursday = function() {
var target = new Date(date);
target.setDate(nDate - ((nDay+6)%7) + 3);
return target;
},
zeroPad = function(nNum, nPad) {
return ...
Cleaner way to do a null check in C#? [duplicate]
...essCalculator().CalculateMoney();
Console.WriteLine(businessDA.Money * 100d);
}
}
The DoAnAction method violates the Law of Demeter. In one function, it accesses a BusinessCalcualtor, a BusinessData, and a decimal. This means that if any of the following changes are made, the line will have ...
C# switch statement limitations - why?
...
100
This is my original post, which sparked some debate... because it is wrong:
The switch sta...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...);
int[] frequencies = new int[10];
for (int i = 0; i < 100000; i++) {
frequencies[(int) (qr.random() * 10)]++;
}
printDistribution("QR", frequencies);
frequencies = new int[10];
for (int i = 0; i < 100000; i++) {
frequen...
How to restore to a different database in sql server?
...TO DISK = @TemplateBackups WITH CHECKSUM, COPY_ONLY, FORMAT, INIT, STATS = 100;
-- Get the backup file list as a table variable
DECLARE @BackupFiles TABLE(LogicalName nvarchar(128),PhysicalName nvarchar(260),Type char(1),FileGroupName nvarchar(128),Size numeric(20,0),MaxSize numeric(20,0),FileId ti...