I’d imagine that if you’re
seeing numerous calls to length interspersed with getItemAt that we simply didn’t
do an optimal loop.
for (var idx = 0; idx <
dataProvider.length; ++idx)
{
var item = getItemAt(idx);
}
get length() is going to be called on
every iteration of the loop. It’d obviously be more efficient to store
length in a local variable and just use that, but maybe we didn’t
somewhere.
Matt
Hi,
I'm struggling to figure out the implied contract
between
DataProviders and their users like ComboBox or
DataGrid. When either
a ComboBox or DataGrid first uses a DataProvider
they seem to make
numerous calls to:
public function get length():Number
and
function getItemAt(index : Number)
but it isn't obvious what the logic is behind
these calls.
I was expecting to see a call to get the length
followed by a series
of calls to getItemAt starting at index 0 and
running to index length-
1, but that's not what I see.
Has anyone run across any good discussions of
DataProviders and their
users?
Thanks,
Randy
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