functx:value-union
The union of two sequences of values
Description
The functx:value-union function returns the union of the values in two sequences in an implementation-defined order. It removes duplicates, even among the values that appear only in one of the sequences. This function is useful because the built-in union (or “|”) operator only works on nodes, not atomic values.
Parameters |
Description |
|---|---|
arg1:string() |
the first sequence |
arg2:string() |
the second sequence |
Examples
XPath |
Results |
|---|---|
functx:value-union((1,2),(3,4)) |
(1, 2, 3, 4) |
functx:value-union((1,2,3),(2,3,4)) |
(1, 2, 3, 4) |
functx:value-union((1,2,2,3),(3,4)) |
(1, 2, 3, 4) |
functx:value-union((1,2,2,3),()) |
(1, 2, 3) |