brendan_puzzler

brendan_puzzler.cfm

<cfscript>
function f(bytes){
  var hash = [];
  var unit = 0;
  var magnitude = '';    

  var sizes = [
    {'unit':'B', size:1},
    {'unit':'KB', size:1024},
    {'unit':'MB', size:1024*1024},
    {'unit':'GB', size:1024*1024*1024},
    {'unit':'TB', size:1024*1024*1024*1024},
    {'unit':'PB', size:1024*1024*1024*1024*1024}
  ];

  for (unit in sizes) {
    hash.append( int(bytes/unit.size) );
  }
  
  unit = hash.reduce(smallestWholeNumberGreaterThanZero, 0);
  magnitude = sizes[arrayFind(hash, unit)].unit; 

  return unit & ' ' & magnitude;
}

function smallestWholeNumberGreaterThanZero(prev, item){

  if (prev eq 0){
    return item;
  } 

  if (item eq 0){
    return prev;
  } 

  return (prev < item ? prev : item);
}

writedump(f(1)); 
writedump(f(1024)); 
writedump(f(1048576)); 
writedump(f(1234567)); 
writedump(f(9999999999)); 
</cfscript>