Space and time of local variable vs. this

Thanks. ...somewhat as expected. Here two methods of a singleton that use local _-reference for this.:

...
, d: function(e) { var _=this; ((e)?[e]:_.es).forEach(function(e){
   _[e[1]+"D"].apply(_,e); }); return _; }
, clr: function(cx,i) { var _=this, c; if (cx<0) {
    c=_.clrs[0].apply(_,_.clrs[-cx]); 
  } else { c=cx^((i)?7:0); c=[(c&4)>>2,(c&2)>>1,c&1]; }
  _.lcd.setColor.apply(_.lcd,c); return _; }
...

...that's why I like 'older' virtual/late-late-binding/interpreted languages that use ^ for noisy return... ;-) ...and old new things for the dredging function: => ...and function / block w/ arguments definition: [ :a :b | ...code using local vars a, b ]. ...some 'good old times' that did not need the curly braces and parenthesis salad...