public static FdbRangeQuery <TValue> Values <TKey, TValue>([NotNull] this FdbRangeQuery <KeyValuePair <TKey, TValue> > query)
{
Contract.NotNull(query, nameof(query));
var f = query.Transform;
//note: we only keep a reference on 'f' to allow the previous query instance to be collected.
Contract.Assert(f != null);
return(query.Map <TValue>((x) => f(x).Value));
}
public static FdbRangeQuery <TResult> Keys <TKey, TValue, TResult>([NotNull] this FdbRangeQuery <KeyValuePair <TKey, TValue> > query, [NotNull] Func <TKey, TResult> transform)
{
Contract.NotNull(query, nameof(query));
Contract.NotNull(transform, nameof(transform));
var f = query.Transform;
//note: we only keep a reference on 'f' to allow the previous query instance to be collected.
Contract.Assert(f != null);
return(query.Map <TResult>((x) => transform(f(x).Key)));
}
public static FdbRangeQuery <V> Values <K, V>(this FdbRangeQuery <KeyValuePair <K, V> > query)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
var f = query.Transform;
//note: we only keep a reference on 'f' to allow the previous query instance to be collected.
Contract.Assert(f != null);
return(query.Map <V>((x) => f(x).Value));
}
public static FdbRangeQuery <R> Keys <K, V, R>(this FdbRangeQuery <KeyValuePair <K, V> > query, [NotNull] Func <K, R> transform)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
if (transform == null)
{
throw new ArgumentNullException("transform");
}
var f = query.Transform;
//note: we only keep a reference on 'f' to allow the previous query instance to be collected.
Contract.Assert(f != null);
return(query.Map <R>((x) => transform(f(x).Key)));
}