public static void WriteToCsv <TKey>(this IFrequencyStatistics <TKey> stat, TextWriter writer, int take = -1)
{
foreach (var pair in take == -1 ? stat.KeyFrequency : stat.KeyFrequency.Take(take))
{
writer.WriteLine($"{pair.Key}, {pair.Value}");
}
}
public static void Add <TKey>(this IFrequencyStatistics <TKey> stat, IEnumerable <KeyValuePair <TKey, int> > pairs)
{
foreach (var pair in pairs)
{
stat.Add(pair.Key, pair.Value);
}
}
public static void ReadFromCsv <TKey>(this IFrequencyStatistics <TKey> stat, TextReader reader, Func <string, TKey> keyParser)
{
stat.Clear();
while (reader.Peek() != -1)
{
var ss = reader.ReadLine().Split(',');
var key = keyParser(ss[0]);
var freq = int.Parse(ss[1]);
stat.Add(key, freq);
}
}