[code:JScript]
function square_of(x) x * x;

players.sort(function(x,y) y['score'] - x['score']);

[code:JScript]
function actions() {
  for (f in document.forms) {
    yield document.forms[f].action
  }
}

[code:JScript]
function showItems(items) {
  for (let i in items) {
    // the variable i has the scope of this block.
    ShowElement('item_' + i);
  }
}

// Using comprehensions:
showItems([ i for ( i in obj ) if ( i> 3 ) ])

// Using generators:
showItems( i for ( i in obj ) if ( i> 3 ) )