Interesting -- thank you gentlemen. Actually this whole thing stems from the issue of inserting/deleting related rows from an intersection table in a many-to-many scenario, and keeping the view consistent with the model in an Ajaxy way. Maybe I will commence a new thread.
On 9/19/07, Ivan Kedrin <[EMAIL PROTECTED]> wrote: > > take a look at http://us.php.net/operators.comparison for some > suggestions: > > > > function array_equal($a, $b) { > return (is_array($a) && is_array($b) && array_diff($a, $b) === > array_diff($b, $a)); > } > > > > function array_identical($a, $b) { > return (is_array($a) && is_array($b) && array_diff_assoc($a, $b) === > array_diff_assoc($b, $a)); > } > > > > alternatively, you could always serialize() and compare using == if your > definition of "equals" requires them to be identical in every respect > including order of the keys and if you don't care about overhead related to > serialization. there are probably also some shortcuts that could save some > cpu cycles but it depends on the type of data you got in your arrays, array > size, etc. > > > > -ivan kedrin > > > ------------------------------ > > *From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > *On Behalf Of *David Mintz > *Sent:* Wednesday, September 19, 2007 4:35 PM > *To:* NYPHP Talk > *Subject:* [nyphp-talk] what's up with array_diff() > > > > > The description of array_diff at > http://www.php.net/manual/en/function.array-diff.php says it computes the > difference between the arrays you pass it, and returns that difference as an > array. > > The behavior is that it finds and returns an array of elements that are > present in the first argument that are not present in the following > arguments, so the order in which you pass in your arrays is all-important. > > I am trying to find out if two arrays are different from each other or > not. I can sort() and then compare with ==, but I thought this might be more > elegant. > > Now I am looking at > > if (array_diff($one,$two) or array_diff($two,$one)) { > /* do something */ > } > > but I wonder if anyone can suggest a better way. > > Thanks. > > -- > David Mintz > http://davidmintz.org/ > > The subtle source is clear and bright > The tributary streams flow through the darkness > > _______________________________________________ > New York PHP Community Talk Mailing List > http://lists.nyphp.org/mailman/listinfo/talk > > NYPHPCon 2006 Presentations Online > http://www.nyphpcon.com > > Show Your Participation in New York PHP > http://www.nyphp.org/show_participation.php > -- David Mintz http://davidmintz.org/ The subtle source is clear and bright The tributary streams flow through the darkness
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