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3v4l.org/U61Ii
LimitIterator_::rewind rewind at the beginning of the foreach...
> TestFilterIterator_::rewind ...and the inner iterator
> > ArrayIterator_::rewind ...and again. now testfilteriterator must look for the first accept()able value
> > ArrayIterator_::valid iterate on arrayiterator...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...and test the first value it found
accept (call #1 on [0]=>'0')
> > ArrayIterator_::next value ('0') was not accepted
> > ArrayIterator_::valid continue iterating...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...and test again. this time it will be valid
accept (call #2 on [1]=>'a')
> TestFilterIterator_::valid limititerator validates the testfilteriterator
> TestFilterIterator_::valid and begins its own iteration...
> TestFilterIterator_::current ...
> TestFilterIterator_::key ...
LimitIterator_::valid foreach begins iteration...
LimitIterator_::current ...
LimitIterator_::key ...
array(2) { and the body of the loop begins
[0]=>
int(1)
[1]=>
string(1) "a"
}
LimitIterator_::next foreach moves to the next element...
> TestFilterIterator_::next ...
> > ArrayIterator_::next ...and now testfilteriterator must find the next accept()able value
> > ArrayIterator_::valid continue iteration...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...and test this value
accept (call #3 on [2]=>'0')
> > ArrayIterator_::next not accepted, keep going...
> > ArrayIterator_::valid ...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...until this value is accepted
accept (call #4 on [3]=>'b')
> TestFilterIterator_::valid limititerator validates testfilteriterator again...
> TestFilterIterator_::current ...
> TestFilterIterator_::key ...
LimitIterator_::valid foreach resumes the loop...
LimitIterator_::current ...
LimitIterator_::key ...
array(2) { loop body
[0]=>
int(3)
[1]=>
string(1) "b"
}
LimitIterator_::next continue iteration...
> TestFilterIterator_::next ...
> > ArrayIterator_::next ...and validate...
> > ArrayIterator_::valid ...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...this value fails
accept (call #5 on [4]=>'0')
> > ArrayIterator_::next resume...
> > ArrayIterator_::valid ...
> > ArrayIterator_::current ...
> > ArrayIterator_::key ...
> > TestFilterIterator_::accept ...this value passes
accept (call #6 on [5]=>'c')
LimitIterator_::valid limititerator fails validation because it has passed the limit of 2 items and the loop ends
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