Find and return all duplicated values within an array using Javascript

Currently, I am facing a challenge with sorting out an array and identifying duplicate values. My goal is to pinpoint the occurrences of a specific value, like a date, within the array. Most of my search results have focused on deleting duplicates, but I simply want to extract the duplicated value itself.

So far, I have made some progress:


var duplicateBookings = [];
$.each(bookedDatesDone, function(i, el){
   if($.inArray(el, duplicateBookings) > -1) duplicateBookings.push(el);
});

Unfortunately, this code generates a new array that lacks any duplicate entries. How can I modify this to achieve my desired result?

javascriptarraysduplicates

Answer №1

To manage duplicate values, you can create an additional array:

var singleBookings = [];
var duplicates = [];

$.each(bookedDatesDone, function(i, el) {
   if ( $.inArray(el, singleBookings) > -1 ) singleBookings.push(el);
   else duplicates.push(el);
});

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