The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex
There is no "better" but the more common one is ||. They have different precedence and || would work like one would expect normally.
ReplyDeleteSee also: Logical operators (the following example is taken from there):
// The result of the expression (false || true) is assigned to $e
// Acts like: ($e = (false || true))
$e = false || true;
// The constant false is assigned to $f and then true is ignored
// Acts like: (($f = false) or true)
$f = false or true;
They are used for different purposes and in fact have different operator precedences. The && and || operators are intended for Boolean conditions, whereas and and or are intended for control flow.
ReplyDeleteFor example, the following is a Boolean condition:
if ($foo == $bar && $baz != $quxx) {
This differs from control flow:
doSomething() or die();
There is nothing bad or better, It just depends on the precedence of operators. Since '||' has higher precedence than 'or', so '||' is mostly used.
ReplyDeleteI don't think one is inherently better than another one, but I would suggest sticking with || because it is the default in most languages.
ReplyDeleteEDIT: As others have pointed out there is indeed a difference between the two.