scope_problem.js

function async( fn )
{
  window.setTimeout( fn, 0 );
}

function problem()
{
  for( var i = 0; i < 10; i++ )
  {
    async( function ()
    {
      console.log( i );
    } );
  }
}

function solution()
{
  for( var i = 0; i < 10; i++ )
  {
    ( function( i )
    {
      async( function ()
      {
        console.log( i );
      } );
    }( i ) );    
  }
}

Good solution ;)

Cool! :)