Description:
Compute the union of sequence-type members in a sequence.
Synatax:
A.union()
Note:
The function computes the union of sequence-type members in sequence A so as to get a sequence in which identical members won’t appear repeatedly. Duplicate members in the same sub-sequence will be retained.
Parameters:
|
A |
A sequence whose members are sequences |
Return value:
A new sequence created through the union of members of sequence A
Example:
|
|
A |
|
|
1 |
=[[1,2,3,4,5],[3,7,8]].union() |
[1,2,3,4,5,7,8] “3” only appears once |
|
2 |
=[[1,2,2],[3,4,4],4].union() |
[1,2,2,3,4,4] The duplicate “4” is stripped out. Identical members in the same sub-sequence are not regarded as duplicate ones |
|
3 |
=[[1,2,2],[2,2,2,3],2].union() |
[1,2,2,2,3] There are three “2s” in the second sub-sequence, so the final result also include three “2s” |
Related functions: