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//type switches in JS 

function typeSwitch(elem){
  switch(typeof elem){
    case 'number':
      return 0;
      break;
    case 'string':
      return 1;
      break;
    case 'boolean':
      return 2;
      break;
    default: return 3;
  }
}
/*   typeSwitch(8)
=> 0
   typeSwitch('8')
=> 1
   typeSwitch(false)
=> 2
   typeSwitch('false')
=> 1
   typeSwitch([])
=> 3*/