Ratio :: Whats the difference?

[fr600]

Please explain me what's the difference between this two:

1. $ratio = $uploaded / $downloaded;
2. $ratio = (($downloaded > 0) ? ($uploaded / $downloaded) : 0);

So which one is better to use?

[olaf]

The first one is only some calcualtion and the second one is a shortcut for a if/else clause.

[Shrike]

The second example uses the ternary operator e.g. var = condition ? val : val. This is a shorthand for an if/else statement:

if( $downloaded > 0 )
{
  $ratio = $uploaded / $downloaded;
}
else
{
  $ratio = 0;
}

Edit: beaten to it by Olaf 😉

[xblue]

fr600 wrote:

So which one is better to use?

Drawback with version 1: if $downloaded is 0, an error will occur when you try to divide by 0. This can obviously not happen with version 2.