Question

I have an array here:

var myArr = [1, 1, 2, 5, 5, 7, 8, 9, 9];

Now I want to remove both appearances of a duplicate. So the desired result is not:

var myArr = [1, 2, 5, 7, 8 ,9];

but

var myArr = [2, 7, 8];

Basically I know how to remove duplicates, but not in that that special way. Thats why any help would be really appreciated!

Please note: My array is filled with strings. The numbers here were only used as an example.

Answer 1

jsfiddle for this code:

var myArr = [1, 1, 2, 5, 5, 7, 8, 9, 9];
var newArr = myArr;
var h,i,j;


for(h = 0; h < myArr.length; h++) {
    var curItem = myArr[h];
    var foundCount = 0;
    // search array for item
    for(i = 0; i < myArr.length; i++) {
        if (myArr[i] == myArr[h])
            foundCount++;
    }
    if(foundCount > 1) {
        // remove repeated item from new array
        for(j = 0; j < newArr.length; j++) {
            if(newArr[j] == curItem) {                
                newArr.splice(j, 1);
                j--;
            }
        }            
    }
}