public static IEnumerable <SearchItem> ToNumber(SearchExpressionContext c)
{
return(c.args.SelectMany(e => e.Execute(c)).Select(item =>
{
SearchExpression.TryConvertToDouble(item, out var value);
return SearchExpression.CreateItem(value);
}));
}
static T Aggregate <T>(SearchItem item, string selector, T agg, Func <double, T, bool> comparer, Func <double, T, T> aggregator) where T : struct
{
if (item != null && SearchExpression.TryConvertToDouble(item, out var d, selector) && comparer(d, agg))
{
return(aggregator(d, agg));
}
return(agg);
}
