Others have already mentioned using the flow designer data pill.
I've added a complete solution.
Works like this:
There is a flow, and an action to check the string match. The action can take any 2 string sets, comma separated also works, and returns true if there is a match. The flow calls the action. If there is match, it returns true.
I've attached the update set with the changes, should you need it. I'm also pasting the custom JS script used in the action below.
(function execute(inputs, outputs) {
// Get the input string sets
var firstSet = inputs.string1.toLowerCase();
var secondSet = inputs.string2.toLowerCase();
// Initialize the flag for intersection
var intersection = false;
// Split the comma-separated strings into arrays and trim each element
var firstArray = firstSet.split(',');
var secondArray = secondSet.split(',');
// Loop through the arrays to find any intersection
for (var i = 0; i < firstArray.length; i++) {
for (var j = 0; j < secondArray.length; j++) {
if (firstArray[i] === secondArray[j]) {
intersection = true;
break;
}
}
if (intersection) {
break;
}
}
// Output the result
outputs.intersection = intersection;
})(inputs, outputs);
