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Math Absolute In Ef Core?


Math Absolute In Ef Core?

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Math Absolute In Ef Core?
Tag : chash , By : changke
Date : November 26 2020, 03:04 PM

it fixes the issue Explanation
I was able to get it to work by moving the Math.Abs() call to the .GroupBy().
var temp = context.Picks
    .Include(x => x.Schedule)
    .Include(x => x.TeamChoice)

    .GroupBy(x => new { gameDiff = Math.Abs(x.Schedule.GameTotal.Value - x.TieBreakerScore.Value), name = x.TeamChoice.Value })

    .Select(g => new
        {
            name = g.Key.name,
            count = g.Count(),
            gameDiff = g.Key.gameDiff
        })
    .OrderByDescending(x => x.count)
    .ThenBy(x => x.gameDiff)
    .Take(top)
    .ToList();
SELECT TOP(@__p_0) [x.TeamChoice].[Value] AS [name], COUNT(*) AS [count], ABS([x.Schedule].[GameTotal] - [x].[TieBreakerScore]) AS [gameDiff]
FROM [Picks] AS [x]
INNER JOIN [Teams] AS [x.TeamChoice] ON [x].[TeamChoiceId] = [x.TeamChoice].[Id]
INNER JOIN [Schedules] AS [x.Schedule] ON [x].[ScheduleId] = [x.Schedule].[Id]
GROUP BY ABS([x.Schedule].[GameTotal] - [x].[TieBreakerScore]), [x.TeamChoice].[Value]
ORDER BY [count] DESC, [gameDiff]
IF OBJECT_ID('dbo.Picks', 'U') IS NOT NULL
    DROP TABLE dbo.Picks

IF OBJECT_ID('dbo.Teams', 'U') IS NOT NULL
    DROP TABLE dbo.Teams

IF OBJECT_ID('dbo.Employees', 'U') IS NOT NULL
    DROP TABLE dbo.Employees

IF OBJECT_ID('dbo.Schedules', 'U') IS NOT NULL
    DROP TABLE dbo.Schedules


CREATE TABLE Teams
(
    Id INT PRIMARY KEY IDENTITY
    ,[Value] VARCHAR(100) NOT NULL
)

CREATE TABLE Employees
(
    Id INT PRIMARY KEY IDENTITY
    ,[Value] VARCHAR(100) NOT NULL
)

CREATE TABLE Schedules
(
    Id INT PRIMARY KEY IDENTITY
    ,GameTotal INT NULL
)

CREATE TABLE Picks
(
    Id INT PRIMARY KEY IDENTITY
    ,ScheduleId INT FOREIGN KEY REFERENCES Schedules(Id) NOT NULL
    ,TeamChoiceId INT FOREIGN KEY REFERENCES Teams(Id) NOT NULL
    ,EmployeeId INT FOREIGN KEY REFERENCES Employees(Id) NOT NULL
    ,LastUpdated DateTime NOT NULL
    ,TieBreakerScore INT NULL
)

INSERT INTO Teams VALUES ('Team1')
INSERT INTO Employees VALUES ('Employee1')
INSERT INTO Schedules VALUES (150),(200)
IINSERT INTO Picks VALUES (1,1,1,GETDATE(),100),(2,1,1,GETDATE(),150)
public class GameContext : DbContext
{
    public GameContext() { }

    public DbSet<Team> Teams { get; set; }
    public DbSet<Pick> Picks { get; set; }
    public DbSet<Schedule> Schedules { get; set; }
    public DbSet<Employee> Employees { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer(@"Server=.;Database=Sandbox;Trusted_Connection=True;ConnectRetryCount=0");
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Pick>(entity =>
        {
            entity.HasOne(x => x.Employee)
                .WithMany(x => x.Picks)
                .HasForeignKey(x => x.EmployeeId);

            entity.HasOne(x => x.TeamChoice)
                .WithMany(x => x.Picks)
                .HasForeignKey(x => x.TeamChoiceId);

            entity.HasOne(x => x.Schedule)
                .WithMany(x => x.Picks)
                .HasForeignKey(x => x.ScheduleId);
        });
    }
}

public class Employee
{
    public int Id { get; set; }
    public string Value { get; set; }

    public ICollection<Pick> Picks { get; set; }
}

public class Schedule
{
    public int Id { get; set; }
    public int? GameTotal { get; set; }

    public ICollection<Pick> Picks { get; set; }
}

public class Team
{
    public int Id { get; set; }
    public string Value { get; set; }

    public ICollection<Pick> Picks { get; set; }
}

public class Pick
{
    public int Id { get; set; }
    public virtual Schedule Schedule { get; set; }
    public int ScheduleId { get; set; }
    public virtual Team TeamChoice { get; set; }
    public int TeamChoiceId { get; set; }
    public int? TieBreakerScore { get; set; }
    public virtual Employee Employee { get; set; }
    public virtual int EmployeeId { get; set; }
    public DateTime LastUpdated { get; set; }
}

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Finding absolute value of a number without using Math.abs()


Tag : java , By : Sonal
Date : March 29 2020, 07:55 AM
wish of those help If you look inside Math.abs you can probably find the best answer:
Eg, for floats:
    /*
     * Returns the absolute value of a {@code float} value.
     * If the argument is not negative, the argument is returned.
     * If the argument is negative, the negation of the argument is returned.
     * Special cases:
     * <ul><li>If the argument is positive zero or negative zero, the
     * result is positive zero.
     * <li>If the argument is infinite, the result is positive infinity.
     * <li>If the argument is NaN, the result is NaN.</ul>
     * In other words, the result is the same as the value of the expression:
     * <p>{@code Float.intBitsToFloat(0x7fffffff & Float.floatToIntBits(a))}
     *
     * @param   a   the argument whose absolute value is to be determined
     * @return  the absolute value of the argument.
     */
    public static float abs(float a) {
        return (a <= 0.0F) ? 0.0F - a : a;
    }

Math.Abs() does not create an exact, absolute Value


Tag : chash , By : Rob
Date : March 29 2020, 07:55 AM
wish helps you This type of detection, to detect when one value is negative and the other positive (order is irrelevant), you should use the Math.Sign method:
if (Math.Sign(a) != Math.Sign(b)) { ... }

How do I get the absolute value of an integer without using Math.abs?


Tag : javascript , By : Chris Lomax
Date : March 29 2020, 07:55 AM
I hope this helps . You can use the conditional operator and the unary negation operator:
function absVal(integer) {
  return integer < 0 ? -integer : integer;
}

How to find the difference of two numbers and the absolute value of that answer without using math.abs function JAVA


Tag : java , By : user179190
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further How can I find the absolute value of the difference of two numbers. (BEGINNER) , A bit more formatted code.
import java.util.Scanner;
class A {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double a;
        double b;
        System.out.println("Enter a: ");
        a = in.nextDouble();

        System.out.println("Enter b: ");
        b = in.nextDouble();
        double value = a - b;



        //If value is negative...make it a positive number.
        value = (value < 0) ? -value : value;
            System.out.println("|"+a + "-" + b +"|" + " =" + value);  // value should be printed here instead of (a-b) or (b-a)
        System.out.println("|"+b + "-" + a +"|" + " =" + value);

    }
}

How to get absolute value for a double value within a function (Without using math.h)


Tag : c , By : Marianisho
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You can do the comparison and put the result (In case of negative double value prepend it with unary - (unary minus) else the value is positive).
Using a simple if statement will be best way to deal with this.
if( dblVal < 0 )
   dblVal =  -dblval;
double myabs(double d){
    if( d < 0 )
      return -d;
    return d;
}
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