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4.1.1
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ktorm-core
/
org.ktorm.entity
/
sumBy
sum
By
inline
fun
<
E
:
Any
,
T
:
BaseTable
<
E
>
,
C
:
Number
>
EntitySequence
<
E
,
T
>
.
sumBy
(
selector
:
(
T
)
->
ColumnDeclaring
<
C
>
)
:
C
?
(
source
)
Return the sum of the column given by
selector
in this sequence.
The operation is terminal.
