Remove duplicate list items from SharePoint REST call result using JavaScript

May 17, 2017 / Kannan / 0 Comments

The following code snippet show how to remove duplicate list items in the JSON result of a SharePoint REST call using JavaScript.

Function Definition:

function RemoveDuplicateItems(items, propertyName) {
    var result = [];
    if (items.length > 0) {
        $.each(items, function (index, item) {
            if ($.inArray(item[propertyName], result) == -1) {
                result.push(item);
            }
        });
    }
    return result;
}

Function Usage:
In the below code, assumption is that, the REST call returns data.d.results and the column for which duplicate items need to be removed is Title

var items = data.d.results;
items = RemoveDuplicateItems(items, 'Title');

#CSOM#Javascript#SharePoint