How to remove duplicate entries from a list?

Neo

If I have a list like

myList  = {"John", "Dan", "Rob", "Rob", "Matt", "Shane", "Matt", "Shane", "John"};

How do I get a list with duplicate entries removed ?

myList_new= {"John", "Dan", "Rob", "Matt", "Shane"};

 

jthi

If it doesn't matter that order changes you can use associative array

Names Default To Here(1);

myList  = {"John", "Dan", "Rob", "Rob", "Matt", "Shane", "Matt", "Shane", "John"};
my_list = Associative Array(myList) << get keys;