deDup.java

// Given an array of integers, remove all of the duplicates

int[] deDup(int[] a) {
    Set<Integer> set = new LinkedHashSet<>();
    for(int x : a) {
        set.add(x);
    }
    int [] ret = new int[set.size()];
    int i =0;
    for(int x : set) {
        ret[i++] = x;
    }
    return ret;
}