def dx(fn, x, delta=0.001):
return (fn(x+delta) - fn(x))/delta
def solve(fn, value, x=0.5, maxtries=1000, maxerr=0.00001):
for tries in xrange(maxtries):
err = fn(x) - value
if abs(err) < maxerr:
return x
slope = dx(fn, x)
x -= err/slope
raise ValueError('no solution found')
Answer:
Explanation:
namespace Jeroen\ReviewIntegration\Observer;
use Magento\Framework\Event\ObserverInterface;
class ProductReview implements ObserverInterface
{
protected $_storeManager;
protected $_request;
public function __construct(
\Magento\Store\Model\StoreManagerInterface $storeManager,
\Magento\Framework\App\Request\Http $request
) {
$this->_storeManager = $storeManager;
$this->_request = $request;
}
public function execute(\Magento\Framework\Event\Observer $observer)
{
return 'test';
}
}
Answer:
1, 4, 7
Explanation:
The instruction in the question can be represented as:
for i in range(1,10,3):
print i
What the above code does is that:
It starts printing the value of i from 1
Increment by 3
Then stop printing at 9 (i.e.. 10 - 1)
So: The sequence is as follows
Print 1
Add 3, to give 4
Print 4
Add 3, to give 7
Print 7
Add 3, to give 10 (10 > 10 - 1).
So, it stops execution.
