C#•2y ago

✅ string.Join returns System.Int32[]

In my constructor I am getting T desiredValue. In this case T is int[]. When debugging the below code:

string desiredValue;
if (typeof(T) == typeof(int[]))
{
    format = "{0} = [{1}]\n";
    desiredValue = string.Join(", ", this.desiredValue);
}

string desiredValue;
if (typeof(T) == typeof(int[]))
{
    format = "{0} = [{1}]\n";
    desiredValue = string.Join(", ", this.desiredValue);
}

I end up getting System.Int32[] any idea why?

14 Replies

Angius•2y ago

Maybe has something to do with desiredValue being a string..?

NatroOP•2y ago

I have another member variable called desiredValue that is of type T. It's weird convention I have to follow :/

Angius•2y ago

Ah, yeah, desiredValue is probably that System.Int32[] string And joining a single string... results in a single string

MODiX•2y ago

Angius#1586

REPL Result: Success

string.Join(" | ", "henlo")

string.Join(" | ", "henlo")

Result: string

henlo

henlo

Compile: 474.770ms | Execution: 29.346ms | React with ❌ to remove this embed.

NatroOP•2y ago

NatroOP•2y ago

NatroOP•2y ago

renamed the string desiredValue to newValue to avoid confusion

Angius•2y ago

Huh Somewhere, desiredValue gets, somehow, turned into a string

NatroOP•2y ago

Let me post the whole class.

public class DirectionalitySetCalibrationData<T> : TestActionBase<HearingInstrumentContext>
{
    public DirectionalitySetCalibrationData(string propertyName, T desiredValue)
    {
        this.propertyName = propertyName;
        this.desiredValue = desiredValue;
    }

    public override bool Execute(HearingInstrumentContext hiContext, TestCaseContext testCaseContext)
    {
        const string assemblyName = "ReSound.Algorithm.Dooku3";
        string pattern = propertyName + " = .*?\\n";

        Type compress = Assembly.LoadFrom(assemblyName + ".Platform.dll").GetType(assemblyName + ".Compress");
        object comCal = Activator.CreateInstance(compress, null);

        var compressCalibrationData = (string)hiContext.SoundProgram.Blackboard.Properties[Directionality.CalibrationData.PropertyName].Value;
        var calibrationData = (string)compress.GetMethod("DecompressString").Invoke(comCal, new object[] { compressCalibrationData });

        string format = "{0} = {1}\n";
        string newValue = string.Empty;
        if (typeof(T) == typeof(int[]))
        {
            format = "{0} = [{1}]\n";
            newValue = string.Join(", ", this.desiredValue);
        }
        else if (typeof(T) == typeof(Vector))
        {
            newValue = this.desiredValue.ToString().Replace(",", ".").Replace(";", ", ");
        }
        else
        {
            newValue = this.desiredValue.ToString().Replace(",", ".");
        }

        string testCalibrationData = Regex.Replace(
           calibrationData, pattern,
           string.Format(format, propertyName, desiredValue));

        hiContext.SoundProgram.Blackboard.Properties[Directionality.CalibrationData.PropertyName].Value = compress
            .GetMethod("CompressString").Invoke(comCal, new object[] { testCalibrationData });

        return true;
    }

    private readonly string propertyName;
    private readonly T desiredValue;
}

public class DirectionalitySetCalibrationData<T> : TestActionBase<HearingInstrumentContext>
{
    public DirectionalitySetCalibrationData(string propertyName, T desiredValue)
    {
        this.propertyName = propertyName;
        this.desiredValue = desiredValue;
    }

    public override bool Execute(HearingInstrumentContext hiContext, TestCaseContext testCaseContext)
    {
        const string assemblyName = "ReSound.Algorithm.Dooku3";
        string pattern = propertyName + " = .*?\\n";

        Type compress = Assembly.LoadFrom(assemblyName + ".Platform.dll").GetType(assemblyName + ".Compress");
        object comCal = Activator.CreateInstance(compress, null);

        var compressCalibrationData = (string)hiContext.SoundProgram.Blackboard.Properties[Directionality.CalibrationData.PropertyName].Value;
        var calibrationData = (string)compress.GetMethod("DecompressString").Invoke(comCal, new object[] { compressCalibrationData });

        string format = "{0} = {1}\n";
        string newValue = string.Empty;
        if (typeof(T) == typeof(int[]))
        {
            format = "{0} = [{1}]\n";
            newValue = string.Join(", ", this.desiredValue);
        }
        else if (typeof(T) == typeof(Vector))
        {
            newValue = this.desiredValue.ToString().Replace(",", ".").Replace(";", ", ");
        }
        else
        {
            newValue = this.desiredValue.ToString().Replace(",", ".");
        }

        string testCalibrationData = Regex.Replace(
           calibrationData, pattern,
           string.Format(format, propertyName, desiredValue));

        hiContext.SoundProgram.Blackboard.Properties[Directionality.CalibrationData.PropertyName].Value = compress
            .GetMethod("CompressString").Invoke(comCal, new object[] { testCalibrationData });

        return true;
    }

    private readonly string propertyName;
    private readonly T desiredValue;
}

No this is C#

MODiX•2y ago

Retax#0813

REPL Result: Success

class C<T> {
    public static string Join(T t) => string.Join(", ", t);
}

C<int[]>.Join(new int[] { 1, 2, 3, 4, 5 })

class C<T> {
    public static string Join(T t) => string.Join(", ", t);
}

C<int[]>.Join(new int[] { 1, 2, 3, 4, 5 })

Result: string

System.Int32[]

System.Int32[]

Compile: 528.068ms | Execution: 51.706ms | React with ❌ to remove this embed.

NatroOP•2y ago

Should I just hard cast then? newValue = string.Join(", ", (int[])this.desiredValue);

MODiX•2y ago

Retax#0813

REPL Result: Success

class C<T> {
    public static string Join(T[] t) => string.Join(", ", t);
}

C<int>.Join(new int[] { 1, 2, 3, 4, 5 })

class C<T> {
    public static string Join(T[] t) => string.Join(", ", t);
}

C<int>.Join(new int[] { 1, 2, 3, 4, 5 })

Result: string

1, 2, 3, 4, 5

1, 2, 3, 4, 5

Compile: 542.995ms | Execution: 54.950ms | React with ❌ to remove this embed.

NatroOP•2y ago

But I am already checking if typeof(T) == typeof(int[]) So in that case it should be fine? Okay, thank you very much 🙂

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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✅ string.Join returns System.Int32[]