Concat Multiple Checkboxes While Filtering Duplicates

This is a solution to find only the unique checkbox choices with the custom JavaScript pipe.

Step 1

Install the Custom JavaScript pipe, and add the parameters as shown in the image below. Feel free to add more values or remove them.

Step 2

In the Request tab of the pipe, add the following code. If you added or removed values in step 1, change the values in the request here.

Array.prototype.contains = function(v) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] === v) return true;
    }
    return false;
};

Array.prototype.unique = function() {
    var arr = [];
    for (var i = 0; i < this.length; i++) {
        if (!arr.contains(this[i])) {
            arr.push(this[i]);
        }
    }
    return arr;
}

var concatAll = "{value1}" + ',' + "{value2}" + ',' + "{value3}" + ',' + "{value4}" + ',' + "{value5}";
var duplicatesArray = concatAll.split(',');

var uniques = duplicatesArray.unique();
uniques.toString().replace(/,/g, ", ");