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Exchange of messages with my forum on general subjects | Forum promotion

My forum is new to this day and I am looking for a post exchange. Name your amount – from 3 to 25, that's what I'm looking at right now. Continuous trading potential if we seem to match correctly :]

c # – ConcurrentDictionary performance – Code review stack exchange

I need to improve the performance of ConcurrentDictionary.

for this i have created 2 classes to check if the yields are more important than the original.

public class FixedConcurrentDictionary
{
    readonly ConcurrentDictionary _dictionary = new ConcurrentDictionary();
    public bool IsEmpty
    {
        get
        {
            return Count == 0;
        }
    }

    public int Count
    {
        get
        {
            return _dictionary.Skip(0).Count();
        }
    }

    public IEnumerable Keys
    {
        get
        {
            return _dictionary.Select(i => i.Key);
        }
    }

    public IEnumerable Values
    {
        get
        {
            return _dictionary.Select(i => i.Value);
        }
    }

    public void Clear()
    {
        _dictionary.Clear();
    }

    public bool TryGetValue(TKey key, out TValue value)
    {
        return _dictionary.TryGetValue(key, out value);
    }

    public bool ContainsKey(TKey key)
    {
        return _dictionary.ContainsKey(key);
    }

    public TValue this(TKey key)
    {
        get
        {
            TValue value;
            if (!TryGetValue(key, out value))
            {
                return default(TValue);
            }
            return value;
        }
        set
        {
            _dictionary(key) = value;
        }
    }
}

 public class FixedConcurrentDictionaryToList
{
    readonly ConcurrentDictionary _dictionary = new ConcurrentDictionary();
    public bool IsEmpty
    {
        get
        {
            return Count == 0;
        }
    }

    public int Count
    {
        get
        {
            return _dictionary.Skip(0).ToList().Count();
        }
    }

    public IEnumerable Keys
    {
        get
        {
            return _dictionary.Select(i => i.Key).ToList();
        }
    }

    public IEnumerable Values
    {
        get
        {
            return _dictionary.Select(i => i.Value).ToList();
        }
    }

    public void Clear()
    {
        _dictionary.Clear();
    }

    public bool TryGetValue(TKey key, out TValue value)
    {
        return _dictionary.TryGetValue(key, out value);
    }

    public bool ContainsKey(TKey key)
    {
        return _dictionary.ContainsKey(key);
    }

    public TValue this(TKey key)
    {
        get
        {
            TValue value;
            if (!TryGetValue(key, out value))
            {
                return default(TValue);
            }
            return value;
        }
        set
        {
            _dictionary(key) = value;
        }
    }
}

 public class BenchDictionary : IDisposable
{
    int _length;
    readonly ReaderWriterLockSlim _locker = new ReaderWriterLockSlim();
    readonly Dictionary _dictionary = new Dictionary();
    readonly Stopwatch _stopwatch = new Stopwatch();
    bool _isStoppedBench = false;
    bool _useStopWatch = false;
    bool _isDisposed = false;
    public BenchDictionary(int length, bool useStopWatch)
    {
        _length = length;
        _useStopWatch = useStopWatch;

        var t1 = new Thread(() =>
        {
            for (int i = 0; i < _length; i++)
            {
                _locker.EnterWriteLock();
                string str = $"t{i}";
                _dictionary(str) = str;
                _locker.ExitWriteLock();
            }
            if (_useStopWatch)
                _stopwatch.Stop();
            _isStoppedBench = true;
        });
        t1.Name = "t1";
        t1.IsBackground = true;

        var t2 = new Thread(() =>
        {
            while (true)
            {
                if (_isStoppedBench || _isDisposed)
                {
                    if (_useStopWatch)
                        System.Console.WriteLine($"BenchDictionary:: _dictionary.Values.Count: {_dictionary.Values.Count} time elapsed: {_stopwatch.Elapsed.TotalSeconds} sec");
                    return;
                }
                _locker.EnterReadLock();
                int count = _dictionary.Values.Count;
                _locker.ExitReadLock();
            }
        });
        t2.Name = "t2";
        t2.IsBackground = true;

        if (_useStopWatch)
            _stopwatch.Start();

        t1.Start();
        t2.Start();
    }

    public void Dispose()
    {
        if (!_isDisposed)
        {
            _isDisposed = true;
        }
    }
}

public class BenchConcurrentDictionary : IDisposable
{
    int _length;
    readonly ConcurrentDictionary _concurrentDictionary = new ConcurrentDictionary();
    readonly Stopwatch _stopwatch = new Stopwatch();
    bool _isStoppedBench = false;
    bool _useStopWatch = false;
    bool _isDisposed = false;

    public BenchConcurrentDictionary(int length, bool useStopWatch)
    {
        _length = length;
        _useStopWatch = useStopWatch;
        var t1 = new Thread(() =>
        {
            for (int i = 0; i < _length; i++)
            {
                string str = $"t{i}";
                _concurrentDictionary(str) = str;
            }
            if (_useStopWatch)
                _stopwatch.Stop();
            _isStoppedBench = true;
        });
        t1.Name = "t1";
        t1.IsBackground = true;

        var t2 = new Thread(() =>
        {
            while (true)
            {
                if (_isStoppedBench || _isDisposed)
                {
                    if (_useStopWatch)
                        System.Console.WriteLine($"BenchConcurrentDictionary:: _concurrentDictionary.Values.Count: {_concurrentDictionary.Values.Count} time elapsed: {_stopwatch.Elapsed.TotalSeconds} sec");
                    return;
                }
                int count = _concurrentDictionary.Values.Count;
            }
        });
        t2.Name = "t2";
        t2.IsBackground = true;

        if (_useStopWatch)
            _stopwatch.Start();

        t1.Start();
        t2.Start();
    }

    public void Dispose()
    {
        if (!_isDisposed)
        {
            _isDisposed = true;
        }
    }
}

public class BenchFixedConcurrentDictionary : IDisposable
{
    int _length;
    readonly FixedConcurrentDictionary _fixedConcurrentDictionary = new FixedConcurrentDictionary();
    readonly Stopwatch _stopwatch = new Stopwatch();
    bool _isStoppedBench = false;
    bool _useStopWatch = false;
    bool _isDisposed = false;

    public BenchFixedConcurrentDictionary(int length, bool useStopWatch)
    {
        _length = length;
        _useStopWatch = useStopWatch;
        var t1 = new Thread(() =>
        {
            for (int i = 0; i < _length; i++)
            {
                string str = $"t{i}";
                _fixedConcurrentDictionary(str) = str;
            }
            if (_useStopWatch)
                _stopwatch.Stop();
            _isStoppedBench = true;
        });
        t1.Name = "t1";
        t1.IsBackground = true;

        var t2 = new Thread(() =>
        {
            while (true)
            {
                if (_isStoppedBench || _isDisposed)
                {
                    if (_useStopWatch)
                        System.Console.WriteLine($"BenchFixedConcurrentDictionary:: _fixedConcurrentDictionary.Count: {_fixedConcurrentDictionary.Count} time elapsed: {_stopwatch.Elapsed.TotalSeconds} sec");
                    return;
                }
                int count = _fixedConcurrentDictionary.Count;
            }
        });
        t2.Name = "t2";
        t2.IsBackground = true;

        if (_useStopWatch)
            _stopwatch.Start();

        t1.Start();
        t2.Start();
    }

    public void Dispose()
    {
        if (!_isDisposed)
        {
            _isDisposed = true;
        }
    }
}

 public class BenchFixedConcurrentDictionaryToList : IDisposable
{
    int _length;
    readonly FixedConcurrentDictionaryToList _fixedConcurrentDictionaryToList = new FixedConcurrentDictionaryToList();
    readonly Stopwatch _stopwatch = new Stopwatch();
    bool _isStoppedBench = false;
    bool _useStopWatch = false;
    bool _isDisposed = false;

    public BenchFixedConcurrentDictionaryToList(int length, bool useStopWatch)
    {
        _length = length;
        _useStopWatch = useStopWatch;
        var t1 = new Thread(() =>
        {
            for (int i = 0; i < _length; i++)
            {
                string str = $"t{i}";
                _fixedConcurrentDictionaryToList(str) = str;
            }
            if (_useStopWatch)
                _stopwatch.Stop();
            _isStoppedBench = true;
        });
        t1.Name = "t1";
        t1.IsBackground = true;

        var t2 = new Thread(() =>
        {
            while (true)
            {
                if (_isStoppedBench || _isDisposed)
                {
                    if (_useStopWatch)
                        System.Console.WriteLine($"BenchFixedConcurrentDictionaryToList:: _fixedConcurrentDictionaryToList.Count: {_fixedConcurrentDictionaryToList.Count} time elapsed: {_stopwatch.Elapsed.TotalSeconds} sec");
                    return;
                }
                int count = _fixedConcurrentDictionaryToList.Count;
            }
        });
        t2.Name = "t2";
        t2.IsBackground = true;

        if (_useStopWatch)
            _stopwatch.Start();

        t1.Start();
        t2.Start();
    }

    public void Dispose()
    {
        if (!_isDisposed)
        {
            _isDisposed = true;
        }
    }
}

Let me markup:

(MemoryDiagnoser)
(KeepBenchmarkFiles)
(MinColumn, MaxColumn, MedianColumn)
(Config(typeof(Config)))
public class TestDictionary
{
    private class Config : ManualConfig
    {
        public Config()
        {
            Add(
                Job.VeryLongRun
                    .With(BenchmarkDotNet.Environments.Platform.AnyCpu)
                    .WithLaunchCount(1)
                    .WithTargetCount(1)
                    .WithWarmupCount(0)
                    );
        }
    }


    (Params(10000000))
    public int Length { get; set; }

    (Benchmark(Baseline = true))
    public void BenchDictionary()
    {
        using (new BenchDictionary(Length, false)) { }
    }

    (Benchmark)
    public void BenchConcurrentDictionary()
    {
        using (new BenchConcurrentDictionary(Length, false)) { }
    }

    (Benchmark)
    public void BenchFixedConcurrentDictionary()
    {
        using (new BenchFixedConcurrentDictionary(Length, false)) { }
    }

    (Benchmark)
    public void BenchFixedConcurrentDictionaryToList()
    {
        using (new BenchFixedConcurrentDictionaryToList(Length, false)) { }
    }
}

The results:
enter description of image here

I will be happy to have obtained a code review for this implementation.
Thank you.

grid – Administration interface – User experience stack exchange

I just wanted to ask for your suggestions on a concern, create an admin interface for a website, do we really need to develop the admin interface or else we can just take a template and code the functionality. What could be better between the two cases?

Full node opening – Bitcoin Stack Exchange

When I try to open my node, it is the error that is displayed

"Error: unable to parse configuration file: parse error on line 1: curl https://bitnodes.io/install-full-node.sh | sh."

Anyone know how to fix this so that I can restart my knot?

Riffle Multiple Lists Together – Mathematica Stack Exchange

I'm trying to write a function that will take multiple lists of function parameters and wrap all of their parameters together as input for a function. To be more explicit, consider if I had the following parameter lists:
P1={a1,a2,a3,...,an}, P2={b1,b2,b3,...,bn}.... Then I want to write a function, let's say called riffleParams, this will do the following:

riffleParams[P1,P2,P3,...PN]={{a1,b1,c1,...},{a2,b1,c1,...},...}

Or in more concrete terms, you would have

riffleParams[{a,b},{1,2,3,4}]={{a,1},{b,1},{a,2},{b,2},{a,3},{b,3},{a,4},{b,4}}

I can think of a few nasty ways to do it, but extending it to an arbitrary number of input parameter lists seems tricky. I think there is probably a cleaner way to implement it than I know of. Thanks for any help.

Google Split script split? – Web application stack exchange

I'm trying to understand a script that basically divides a cell horizontally in a Google sheet that automatically fills in with a form.

= The SPLIT formula (AF5, ",") works, but when a new form entry is added, a new line is created and I then need to copy paste this formula into this entry. I'm just assuming that a script can be applied to automatically split entries in a column as they are submitted by form users, but I have no knowledge of scripting.

Thank you
Travis

Sandbox on macOS – Information Security Stack Exchange

I am trying to create a script based on this:
https://github.com/ZFPSystems/tbms
So I can run a document / video on a sandbox, but it doesn't work, it refuses permissions, that's what I have:

(version 1)
(debug deny)

(deny default)

(allow file-read-data file-read-metadata
  (regex "^/Users/userX/Downloads/video")
)

How can I run a video for example which is on my downloads folder?

Thank you

Connecting flight at Heathrow – Travel Stack Exchange

I hold a Filipino passport, upon my return from Brazil to the Philippines, I will have a connecting flight to Heathrow. It's less than 24 hours but the next day's flight. April 13, 4 p.m., I will arrive at Heathrow Airport and depart tomorrow at 12 p.m. I intend to sleep at the airport. Will a type of visa be required?

Python Basic Calculator – Code Review Stack Exchange

Hello I made this calculator in Python, I know it's pretty basic but I want your feedback if I did it right or not, and if you find any errors or not.
P.S (I know I could do better than this if I looked on the internet but I want to evolve that's why I'm here)

#Commands
print("Operations that you can use:")
print("Addition: +")
print("Subtraction: -")
print("Multiplication: *")
print("Division: /")
print("Exponentiation: **")
print("Radicalization: **(1/")

#Variables
x = None
y = None
z = None
ce = 0

# Operations
add = float(x) + float(z)
sub = float(x) - float(z)
div = float(x) / float(z)
mul = float(x) * float(z)
rad = float(x) ** (1 / float(z))
exp = float(x) ** float(z)

while ce < 1:

# Inputs
    x = float(input("First Value: "))
    y = input("Operation: ")
    z = float(input("Second Value: "))

# If
    if '+' in y:
        print(add)
    elif '-' in y:
        print(sub)
    elif "https://codereview.stackexchange.com/" in y:
        print(div)
    elif "**(1/" in y:
        print(rad)
    elif "**" in y:
        print(exp)
    elif '*' in y:
        print(mul)
print("Continue or Exit?")
ce = int(input("    0    or   1  : "))

```