javascript裡的類思想

來源:互聯網
上載者:User
javascript <script language="javascript" runat="server">
function MyFile(filename, filesize, type, datelastaccessed)
{
 this.filename = filename;
 this.filesize = filesize;
 this.type = type;
 this.datelastaccessed = datelastaccessed;
}
function ArrayFile()
{
 this.f = new Array();
 this.count = 0;
 this.add=function(file)
 {
  this.f.push( file );
  this.count+=1;
 }
 this.max=function(f1, f2, field)
 {
  switch( field )
  {
   case "filename":
    return f1.filename>f2.filename? true:false;
   case "filesize":
    return f1.filesize>f2.filesize? true:false;
   case "type":
    return f1.type>f2.type? true:false;
   case "datelastaccessed":
    return f1.datelastaccessed>f2.datelastaccessed? true:false;
   default:
    return false;
  }
 }
 this.sort=function(field, order)
 {
 //order:desc asc
 //field:filename filesize
  var len = this.f.length;
  if( len < 2 ) return;
  var tmp;
  for(var i=0; i<len-1; i++)
  {
   for(var j=i+1; j<len; j++)
   {
    if( order == "desc")
    {
     if( !this.max( this.f[i], this.f[j], field ) )
     {
      tmp = this.f[i];
      this.f[i] = this.f[j];
      this.f[j] = tmp;
     }
    }
    else if ( order == "asc")
    {
     if( this.max( this.f[i], this.f[j], field ) )
     {
      tmp = this.f[i];
      this.f[i] = this.f[j];
      this.f[j] = tmp;
     }
    }
   }
  }
 }
}
</script>


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