Re: Improved for each loop
Roedy Green wrote:
On Sun, 12 Jul 2009 19:58:26 -0700, markspace <nospam@nowhere.com>
wrote, quoted or indirectly quoted someone who said :
Object[] array ....
for( int i : array.length ) {
....
}
These in theory require an Iterable interface somewhere. Perhaps that
is why they left that off.
You might generalise that to also permit things like this:
for ( int i: anArray )
for ( int i: anArrayList )
for ( int i: someString )
I think those extensions are safe. If muddled them up with the
existing forms, the body of the loop would generate type errors.
Not really:
int[] anArray;
for (int i: anArray) // Oops.
List<Integer> anArrayList;
for (int i: anArrayList) // oops.
I am all in favour of short forms for common idioms. You eye can
grasp them in an instant and be sure some tiny variant is not
masquerading as a common idiom the way is so often with the standard
for.
There was one oversight in the original that logically should have
been there.
for ( char c : string )
If it makes you feel any better, In my home brew language Abundance
circa 1980, You could abbreviate those to
<<<FOR anArray ... FOR>>>
<<<FOR anArrayList ... FOR>>>
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