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has
Last update:
May 18, 2026
Returns whether the set contains a given element.
Description
Tests membership using the set's equality rules (case-sensitive for default sets; case-insensitive for nocase variants).
Returns
Boolean.
Category
ColdFusion Set member methods
Function syntax
set.has(element)Parameters
| Parameter | Description |
|---|---|
| element | The value to test. |
See also
Example
The following example uses this API in
cfscript (syntax: set.has(element)).
<cfscript>
s = setNew();
s.add("apple");
s.add("banana");
writeOutput(s.has("apple")); // true
writeOutput(s.has("orange")); // false
nc = setNew("nocase");
nc.add("Hello");
writeOutput(nc.has("HELLO")); // true
</cfscript>
Real-world example
Check whether a feature flag code is enabled before running expensive reporting code.
<cfscript>
/**
* Returns true if a feature is enabled for the given code.
* Flags stored in a set for O(1) average lookup.
*/
function isFeatureEnabled(required string featureCode, required any enabledSet) {
return enabledSet.has(featureCode);
}
enabled = setNew();
enabled.add("BETA_REPORTS");
enabled.add("NEW_CHECKOUT");
if (isFeatureEnabled("BETA_REPORTS", enabled)) {
writeOutput("Show beta reports UI.");
}
</cfscript>
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