2020-12-29 01:14:19 +00:00
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text.RegularExpressions;
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using ConsoleTables;
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using CsvHelper;
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using CsvHelper.Configuration;
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using CsvHelper.Configuration.Attributes;
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using Microsoft.ML;
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using Microsoft.ML.Data;
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using Microsoft.ML.Transforms.Text;
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namespace NoSoliciting.Trainer {
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internal static class Program {
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private static void Main(string[] args) {
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var full = args[0] == "create";
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var ctx = new MLContext(1);
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using var fileStream = new FileStream("../../../data.csv", FileMode.Open);
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using var stream = new StreamReader(fileStream);
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using var csv = new CsvReader(stream, new CsvConfiguration(CultureInfo.InvariantCulture) {
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HeaderValidated = null,
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});
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var records = csv.GetRecords<Data>().ToList();
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var classes = new Dictionary<string, uint>();
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foreach (var record in records) {
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// normalise the message
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record.Message = Util.Normalise(record.Message);
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// keep track of how many message of each category we have
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if (!classes.ContainsKey(record.Category!)) {
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classes[record.Category] = 0;
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}
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classes[record.Category] += 1;
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}
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// calculate class weights
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var weights = new Dictionary<string, float>();
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foreach (var (category, count) in classes) {
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var nSamples = (float) records.Count;
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var nClasses = (float) classes.Count;
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var nSamplesJ = (float) count;
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var w = nSamples / (nClasses * nSamplesJ);
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weights[category] = w;
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}
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var df = ctx.Data.LoadFromEnumerable(records);
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var ttd = ctx.Data.TrainTestSplit(df, 0.2, seed: 1);
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2020-12-29 02:01:35 +00:00
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void Compute(Data data, Data.Computed computed) {
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data.Compute(computed, weights);
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}
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2020-12-29 01:14:19 +00:00
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var pipeline = ctx.Transforms.Conversion.MapValueToKey("Label", nameof(Data.Category))
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2020-12-29 02:01:35 +00:00
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.Append(ctx.Transforms.CustomMapping((Action<Data, Data.Computed>) Compute, "Compute"))
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2020-12-29 01:14:19 +00:00
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.Append(ctx.Transforms.Text.NormalizeText("MsgNormal", nameof(Data.Message), keepPunctuations: false))
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.Append(ctx.Transforms.Text.TokenizeIntoWords("MsgTokens", "MsgNormal"))
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// .Append(ctx.Transforms.Text.RemoveStopWords("MsgNoStop", "MsgTokens",
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// "the",
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// "a",
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// "of",
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// "in",
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// "for",
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// "from",
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// "and",
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// "discord"
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// ))
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.Append(ctx.Transforms.Text.RemoveDefaultStopWords("MsgNoDefStop", "MsgTokens"))
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.Append(ctx.Transforms.Text.RemoveStopWords("MsgNoStop", "MsgNoDefStop",
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"discord"
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))
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.Append(ctx.Transforms.Conversion.MapValueToKey("MsgKey", "MsgNoStop"))
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.Append(ctx.Transforms.Text.ProduceNgrams("MsgNgrams", "MsgKey", weighting: NgramExtractingEstimator.WeightingCriteria.Tf))
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.Append(ctx.Transforms.NormalizeLpNorm("FeaturisedMessage", "MsgNgrams"))
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.Append(ctx.Transforms.Conversion.ConvertType("CPartyFinder", "PartyFinder"))
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.Append(ctx.Transforms.Conversion.ConvertType("CShout", "Shout"))
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.Append(ctx.Transforms.Conversion.ConvertType("CTrade", "ContainsTradeWords"))
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.Append(ctx.Transforms.Conversion.ConvertType("CSketch", "ContainsSketchUrl"))
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.Append(ctx.Transforms.Conversion.ConvertType("HasWard", "ContainsWard"))
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.Append(ctx.Transforms.Conversion.ConvertType("HasPlot", "ContainsPlot"))
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.Append(ctx.Transforms.Conversion.ConvertType("HasNumbers", "ContainsHousingNumbers"))
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.Append(ctx.Transforms.Concatenate("Features", "FeaturisedMessage", "CPartyFinder", "CShout", "CTrade", "HasWard", "HasPlot", "HasNumbers", "CSketch"))
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.Append(ctx.MulticlassClassification.Trainers.SdcaMaximumEntropy(exampleWeightColumnName: "Weight"))
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.Append(ctx.Transforms.Conversion.MapKeyToValue("PredictedLabel"));
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var train = full ? df : ttd.TrainSet;
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var model = pipeline.Fit(train);
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ctx.Model.Save(model, df.Schema, @"../../../model.zip");
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var testPredictions = model.Transform(ttd.TestSet);
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var eval = ctx.MulticlassClassification.Evaluate(testPredictions);
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var predEngine = ctx.Model.CreatePredictionEngine<Data, Prediction>(model);
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var slotNames = new VBuffer<ReadOnlyMemory<char>>();
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predEngine.OutputSchema["Score"].GetSlotNames(ref slotNames);
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var names = slotNames.DenseValues()
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.Select(column => column.ToString())
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.ToList();
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var cols = new string[1 + names.Count];
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cols[0] = "";
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for (var j = 0; j < names.Count; j++) {
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cols[j + 1] = names[j];
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}
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var table = new ConsoleTable(cols);
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for (var i = 0; i < names.Count; i++) {
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var name = names[i];
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var confuse = eval.ConfusionMatrix.Counts[i];
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var row = new object[1 + confuse.Count];
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row[0] = name;
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for (var j = 0; j < confuse.Count; j++) {
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row[j + 1] = confuse[j];
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}
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table.AddRow(row);
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}
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Console.WriteLine(table.ToString());
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Console.WriteLine($"Log loss : {eval.LogLoss * 100}");
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Console.WriteLine($"Macro acc: {eval.MacroAccuracy * 100}");
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Console.WriteLine($"Micro acc: {eval.MicroAccuracy * 100}");
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if (full) {
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return;
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}
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while (true) {
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var msg = Console.ReadLine()!.Trim();
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var parts = msg.Split(' ', 2);
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ushort.TryParse(parts[0], out var channel);
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var input = new Data {
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Channel = channel,
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// PartyFinder = channel == 0,
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Message = parts[1],
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};
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var pred = predEngine.Predict(input);
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Console.WriteLine(pred.Category);
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for (var i = 0; i < names.Count; i++) {
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Console.WriteLine($" {names[i]}: {pred.Probabilities[i] * 100}");
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}
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}
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}
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}
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[SuppressMessage("ReSharper", "UnusedMember.Global")]
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internal class Data {
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[LoadColumn(0), Index(0)]
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public string? Category { get; set; }
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[LoadColumn(1), Index(1)]
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public uint Channel { get; set; }
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[LoadColumn(2), Index(2)]
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public string Message { get; set; }
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#region computed
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2020-12-29 01:14:19 +00:00
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private static readonly Regex WardRegex = new Regex(@"w.{0,2}\d", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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private static readonly Regex PlotRegex = new Regex(@"p.{0,2}\d", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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2020-12-29 01:14:19 +00:00
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private static readonly string[] PlotWords = {
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"plot",
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"apartment",
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"apt",
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};
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private static readonly Regex NumbersRegex = new Regex(@"\d{1,2}.{0,2}\d{1,2}", RegexOptions.Compiled);
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private static readonly string[] TradeWords = {
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"B> ",
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"S> ",
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"buy",
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"sell",
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"WTB",
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"WTS",
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};
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private static readonly Regex SketchUrlRegex = new Regex(@"\.com-\w+\.\w+", RegexOptions.IgnoreCase | RegexOptions.Compiled);
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2020-12-29 02:01:35 +00:00
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internal class Computed {
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public float Weight { get; set; }
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public bool PartyFinder { get; set; }
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public bool Shout { get; set; }
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2020-12-29 02:01:35 +00:00
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public bool ContainsWard { get; set; }
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2020-12-29 02:01:35 +00:00
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public bool ContainsPlot { get; set; }
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public bool ContainsHousingNumbers { get; set; }
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public bool ContainsTradeWords { get; set; }
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2020-12-29 02:01:35 +00:00
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public bool ContainsSketchUrl { get; set; }
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}
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2020-12-29 01:14:19 +00:00
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2020-12-29 02:01:35 +00:00
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internal void Compute(Computed output, Dictionary<string, float> weights) {
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output.Weight = this.Category == null ? 1 : weights[this.Category];
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output.PartyFinder = this.Channel == 0;
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output.Shout = this.Channel == 11 || this.Channel == 30;
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output.ContainsWard = this.Message.ContainsIgnoreCase("ward") || WardRegex.IsMatch(this.Message);
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output.ContainsPlot = PlotWords.Any(word => this.Message.ContainsIgnoreCase(word)) || PlotRegex.IsMatch(this.Message);
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output.ContainsHousingNumbers = NumbersRegex.IsMatch(this.Message);
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output.ContainsTradeWords = TradeWords.Any(word => this.Message.ContainsIgnoreCase(word));
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output.ContainsSketchUrl = SketchUrlRegex.IsMatch(this.Message);
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}
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2020-12-29 01:14:19 +00:00
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2020-12-29 02:01:35 +00:00
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#endregion
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2020-12-29 01:14:19 +00:00
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}
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internal class Prediction {
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[ColumnName("PredictedLabel")]
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public string Category { get; set; }
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[ColumnName("Score")]
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public float[] Probabilities { get; set; }
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}
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internal static class Ext {
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public static bool ContainsIgnoreCase(this string haystack, string needle) {
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return CultureInfo.InvariantCulture.CompareInfo.IndexOf(haystack, needle, CompareOptions.IgnoreCase) >= 0;
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}
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}
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}
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