How can you convert the following code to PHP?
summat = [sum(arra[i:i+4]) for i in range(0,len(arra),4)]
My attempt
$summat = array()
foreach ( range(0, $arra.length, 4) as $i) {
$summat = array ( array_sum( array_slice( $array, $i, $i+5) ) ) // don't know how to append the sums the array
$sum = array();
foreach(range(0, count($a), 4) as $i)
$sum []= array_sum(array_slice($a, $i, 4));
"[]=" is an append-to-array operator
slice's second parameter is slice length, not the last index
or even simpler
$sum = array_map('array_sum', array_chunk($a, 4));
To append a value to an array, use:
$summat[] = array_sum(...);
The PHP way of doing ranges is similar to the C way:
for($i = 0; $i < count($arra); $i += 4) {
// ...
}
