One feature I've seen in a couple of languages that I
like is a finally clause for looping constructs such as
'while' and 'for'.  Example:

while(expression)
{
}
finally
{
}

The finally clause is executed if the loop terminates normally when the expression evaluates to false.  If the loop is exited via a break statement the finally clause is not executed.  The most common place I have seen this come in handy are loops that are doing a search and you want to do something if the search fails.

for (i = 0; i < a.length; i++)
{
  if(a[i] == search_value)
     break;
 }
finally
{
  // Couldn't find search value so add it
  a ~= search_value;
}


Patrick Down

"Patrick Down" <pdown@austin.rr.com> escribió en el mensaje
news:a1e2b8$26eb$1@digitaldaemon.com...
|
| One feature I've seen in a couple of languages that I
| like is a finally clause for looping constructs such as
| 'while' and 'for'.  Example:
|
| while(expression)
| {
| }
| finally
| {
| }
|
| The finally clause is executed if the loop terminates normally
| when the expression evaluates to false.  If the loop is exited
| via a break statement the finally clause is not executed.  The
| most common place I have seen this come in handy are loops
| that are doing a search and you want to do something if the
| search fails.
|
| for (i = 0; i < a.length; i++)
| {
|   if(a[i] == search_value)
|      break;
|  }
| finally
| {
|   // Couldn't find search value so add it
|   a ~= search_value;
| }
|
|
| Patrick Down
|
|

No one answered to this, either. I think it's interesting. Similar to the do { ... } while (...) { ... } proposed some time ago. Maybe the finally keyword could be changed. Thoughts?

————————————————————————— Carlos Santander


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"Carlos Santander B." <carlos8294@msn.com> wrote in news:b5keer$1570$1@digitaldaemon.com:
> 
> No one answered to this, either. I think it's interesting. Similar to the do { ... } while (...) { ... } proposed some time ago. Maybe the finally keyword could be changed. Thoughts?


Python uses "while else" and "for else" for the same thing. I thought "finally" made more sense.

== Quote from Patrick Down (pat@codemoon.com)'s article
> "Carlos Santander B." <carlos8294@msn.com> wrote in news:b5keer$1570$1@digitaldaemon.com:
> >
> > No one answered to this, either. I think it's interesting. Similar to the do { ... } while (...) { ... } proposed some time ago. Maybe the finally keyword could be changed. Thoughts?
> Python uses "while else" and "for else" for the same thing. I thought "finally" made more sense.

Also it would be nice to add a "while-else" statement like that:

while (condition1)
{
    xxx
}
else
{
    yyy
}

that will do the same thing as below:

if (condition1)
{
    do
    {
        xxx
    }
    while (condition1);
}
else
{
    yyy
}

or

bool b = false;

while (condition1)
{
    b = true;
    xxx
}

if (!b)
{
    yyy
}

It will be usefull to do such thing like fetching rows from db. When there are no rows you can send a message using ele.

Also it may be applied to for and foreach statements.