function LU(/* ... */) {
      var lu = [];
      for (var a = arguments, i = 0, l = a.length; i < l; i += 2) {
        lu[a[i]] = a[i + 1];
      }
      return lu;
    }
// Internal use: generate a lookup table for a key,value set.
Internal use: generate a lookup table for a key,value set.
Internal use : generate a lookup table for a key value set .
function LU() {
      var lu = [];
      for (var a = arguments, i = 0, l = a.length; i < l; i += 2) {
        lu[a[i]] = a[i + 1];
      }
      return lu;
    }
function LU ( ) { var lu = [ ] ; for ( var a = arguments , i = 0 , l = a . length ; i < l ; i += 2 ) { lu [ a [ i ] ] = a [ i + 1 ] ; } return lu ; }
Internal use: generate a lookup table for a key,value set.
Internal use : generate a lookup table for a key value set .
/* ... */