<awangdev>567. Permutation in String_2.java
private Integer[] countFreq(String s) {

        Integer[] freq = new Integer[256];
        for (char c : s.toCharArray()) freq[c] = freq[c] == null ? 1 : freq[c] + 1;
        return freq;
    }
private Integer [ ] var_0 ( String var_2 ) {
  Integer [ ] var_5 = new Integer [ 256 ] ;
  for ( char var_7 : var_2 . toCharArray ( ) ) var_5 [ var_7 ] = var_5 [ var_7 ] == null ? 1 : var_5 [ var_7 ] + 1 ;
  return var_5 ;
}
