public static IEnumerable <Tuple <string, int> > GetTopWordsByColumn(List <PersonName> personNameList,
ColumnsEnum column, int iRank, bool isDescending)
{
Func <PersonName, string> getPersonProperty = GetFunctionStrategy(column);
Dictionary <string, int> wordCountDictionary = new Dictionary <string, int>();
personNameList.ForEach(personName => { GetWordCount(getPersonProperty(personName), wordCountDictionary); });
var wordCounts = wordCountDictionary.Select(e => new Tuple <string, int>(e.Key, e.Value));
wordCounts = isDescending ? wordCounts.OrderByDescending(t => t.Item2) : wordCounts.OrderBy(t => t.Item2);
return(wordCounts.Take(iRank));
}
static void PrintTopByField(List <PersonName> personNames, ColumnsEnum column, int iRank, bool isDescending, bool useWholeWord = true)
{
IEnumerable <Tuple <string, int> > topNames = useWholeWord ? NameAnalyzer.GetTopByColumn(personNames, column, iRank, isDescending)
: NameAnalyzer.GetTopWordsByColumn(personNames, column, iRank, isDescending);
Console.WriteLine($"------------------{(isDescending ? "TOP" : "LAST") } {iRank } BY {((object)column).ToString()} ");
if (topNames != null)
{
foreach (var topName in topNames)
{
Console.WriteLine($"{topName.Item1}: {topName.Item2}");
}
}
}
private DataTable PrepareDataTable(string tableName, ColumnsEnum selectedColumn, object value)
{
var table = new DataTable(tableName);
table.Columns.Add(Enum.GetName(typeof(ColumnsEnum), ColumnsEnum._int), typeof(int));
table.Columns.Add(Enum.GetName(typeof(ColumnsEnum), ColumnsEnum._varChar3), typeof(string));
var row = table.NewRow();
row[(int)selectedColumn] = value;
table.Rows.Add(row);
return(table);
}
private static Func <PersonName, string> GetFunctionStrategy(ColumnsEnum column)
{
Func <PersonName, string> getPersonProperty = (x) => x.FirstName;
switch (column)
{
case ColumnsEnum.FirstLastName:
getPersonProperty = (x) => x.FirstLastName;
break;
case ColumnsEnum.SecondLastName:
getPersonProperty = (x) => x.SecondLastName;
break;
}
return(getPersonProperty);
}
public static IEnumerable <Tuple <string, int> > GetTopByColumn(List <PersonName> personNameList, ColumnsEnum column, int iRank, bool isDescending)
{
Func <PersonName, string> getPersonProperty = GetFunctionStrategy(column);
var groups = personNameList.GroupBy(getPersonProperty, new StringComparer());
groups = isDescending ? groups.OrderByDescending(g => g.Count()) : groups.OrderBy(g => g.Count());
return(groups.Take(iRank).Select(g => new Tuple <string, int>(g.Key, g.Count())).ToList());
}
