var x = "hello "
var my_closure = function (y) {
  alert(x + y);
}
my_closure("world");

##</code><code>##

for (@some_array) {
  # Declaring this in the loop creates a new variable per
  # instance of the loop.
  my $x = $_;
  push @closures, sub {
    # Do something using x.  I'll just return it.
    return $x;
  };
}
# We now have one closure per array element.

##</code><code>##

for (var i = 0; i < some_array.length; i++) {
  // Declaring this in the loop creates a one variable for
  // all instances of the loop.
  var x = some_array[i];
  closures.push(function () {
    // Do something using x.  I'll just return it.
    return x;
  });
}
// All closures now point at the last element.

##</code><code>##

for (var i = 0; i < some_array.length; i++) {
  // This declares and immediately calls a function, and x
  // is scoped to that function call.
  (function (x) {
     closures.push(function () {
      // Do something using x.  I'll just return it.
      return x;
    });
  )(some_array[i]); // And here is where we bind the value.
}
// We now have one closure per array element.