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size
Last update:
May 18, 2026
Returns the number of distinct elements in the set.
Description
Cardinality of the set. count may be an alias of size (verify in release documentation).
Returns
Numeric.
Category
ColdFusion Set member methods
Function syntax
set.size()
set.count()Parameters
| Parameter | Description |
|---|---|
| — | None. |
See also
Example
The following example uses this API in
cfscript (syntax: set.size()).
<cfscript>
s = setNew();
writeOutput(s.size()); // 0
s.add("a");
s.add("b");
writeOutput(s.size()); // 2
</cfscript>
Real-world example
Dashboard KPI: count distinct customers who placed an order in the set.
<cfscript>
function uniqueCustomerCount(required any orderIdSet) {
return orderIdSet.size();
}
ids = setNew();
ids.add(1001);
ids.add(1002);
ids.add(1001); // duplicate
writeOutput(uniqueCustomerCount(ids)); // 2
</cfscript>
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