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remove
Last update:
May 18, 2026
Removes an element from the set.
Description
Removes an element from a set.
Returns
Boolean.
Category
ColdFusion Set member methods
Function syntax
set.remove(element)Parameters
| Parameter | Description |
|---|---|
| element | Element to remove. |
See also
Example
The following example uses this API in
cfscript (syntax: set.remove(element)).
<cfscript>
s = setNew();
s.add("x");
s.add("y");
removed = s.remove("x");
writeOutput(removed); // true
deleted=s.delete("x");
writeOutput(deleted); // error on undefined
</cfscript>
Real-world example
Real-world example: one-time API tokens (allowlist + remove boolean)
<cfscript>
// In-memory allowlist (use Redis or DB in production for clustering)
allowedTokens = setNew();
function issueToken(required string rawToken) {
allowedTokens.add(rawToken);
}
function consumeToken(required string presentedToken) {
var removed = allowedTokens.remove(presentedToken);
if (removed) {
return { "ok": true, "reason": "consumed" };
}
return { "ok": false, "reason": "invalid_or_replay" };
}
issueToken("one-time-7f3a9c");
writeOutput(serializeJSON(consumeToken("one-time-7f3a9c"))); // ok true — first use
writeOutput(serializeJSON(consumeToken("one-time-7f3a9c"))); // ok false — replay
</cfscript>
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