Here’s how to use enum() function.
Description:
Generate a new record sequence by performing enumeration grouping on an record sequence according to another record sequence.
Syntax:
P.enum(E, y)
Note:
The function generates a new record sequence by grouping the record sequence P according to the record sequence/sequence E.
Parameter:
|
P |
Record sequence to be grouped |
|
E |
Record sequence/sequence |
|
y |
A field name or an expression in P. y is allowed to be omitted |
Option:
|
@r |
Repetitive enum, that is, allocate a certain record of P to multiple groups |
|
@p |
The return value is composed of sequence numbers of members that exist in P |
|
@n |
Group P’s records according to E’s members and return the result groups. In the result set, there is a group to store the unaligned member(s) |
Function keyword:
|
? |
It represents the value of y |
Return value:
Record sequence
Example:
E is a sequence:
|
|
A |
|
|
1 |
=["?<=60","?>=60 && ?<=90","?>=90"] |
Use y to replace ? in the group condition when computing. |
|
2 |
=demo.query("select * from SCORES") |
|
|
3 |
=A2.enum(A1,SCORE) |
3 groups in total, and a member will not appear in multiple groups. |
|
4 |
=A2.enum@r(A1,SCORE) |
3 groups in total; 60 and 90 are allocated to multiple groups. |
|
5 |
=A2.enum@p(A1,SCORE) |
3 groups in total; return sequence numbers of members that exist in A2 by group. |
|
6 |
=["?<=60","?>=60 && ?<=90"] |
|
|
7 |
=A2.enum@n(A6,SCORE) |
3 groups in total, group 1 for those not greater than 60, group 2 for those greater than 60 and not greater than 90, and group 3 for the remaining values. |
Note:
p.enum() is mainly used to conduct the enum grouping on a single record sequence. The grouping result is a sequence composed of multiple record sets, and each record set is a group. This sequence is in an order exactly equal to that of E. Therefore, you can retrieve the associated group information from E via the sequence numbers. The group result is not a record sequence, so no new data structure will be generated.
Related function: