init
inline fun <ID : Any, T, R> ReductionType.init(field: Field<ID, T>, default: R, crossinline self: (ID, T) -> R): R
Computes the initial value for a reduction, depending on whether the local value is included.
Return
the result of self if this is IncludingSelf, or default if ExcludingSelf.
Parameters
field
the field from which to extract the local ID and value.
default
the value to use if the local value is excluded.
self
a function that computes the initial value from the local ID and value.
inline fun <ID : Any, T, R> ReductionType.init(field: Field<ID, T>, default: R, crossinline self: (FieldEntry<ID, T>) -> R): R
Computes the initial value for a reduction using a FieldEntry, based on whether the local value is included.
Return
the result of self if this is IncludingSelf, or default if ExcludingSelf.
Parameters
field
the field from which to extract the local entry.
default
the value to use if the local value is excluded.
self
a function that computes the initial value from the local FieldEntry.