dist/regular/loose/dejavu.js
function insert(arr, rest_items) {
        var diff = difference(slice(arguments, 1), arr);
        if (diff.length) {
            Array.prototype.push.apply(arr, diff);
        }
        return arr.length;
    }
function insert(arr, rest_items) {
        var diff = difference(slice(arguments, 1), arr);
        if (diff.length) {
            Array.prototype.push.apply(arr, diff);
        }
        return arr.length;
    }
function insert ( arr , rest_items ) { var diff = difference ( slice ( arguments , 1 ) , arr ) ; if ( diff . length ) { Array . prototype . push . apply ( arr , diff ) ; } return arr . length ; }
Insert item into array if not already present.
Insert item into array if not already present .