public override IPersonsPair Find(IList <Person> persons)
{
var personPairs = GetPersonPairsWithAgeDifference(persons);
var targetPair = new PersonsPairWithAgeDifference();
if (personPairs.Any())
{
targetPair = personPairs.OrderBy(pp => pp.AgeDifference).ToList().First();
}
return(targetPair);
}
protected List <PersonsPairWithAgeDifference> GetPersonPairsWithAgeDifference(IList <Person> persons)
{
var personPairs = new List <PersonsPairWithAgeDifference>();
for (var i = 0; i < persons.Count - 1; i++)
{
for (var j = i + 1; j < persons.Count; j++)
{
var pair = new PersonsPairWithAgeDifference
{
Person1 = persons[i].BirthDate < persons[j].BirthDate ? persons[i] : persons[j],
Person2 = persons[i].BirthDate < persons[j].BirthDate ? persons[j] : persons[i]
};
pair.AgeDifference = pair.Person2.BirthDate - pair.Person1.BirthDate;
personPairs.Add(pair);
}
}
return(personPairs);
}
