Question

php please

shiftNTimes

// Modify array so it is "left shifted" n times -- so shiftNTimes(array(6, 2, 5, 3), 1)

// changes the array argument to (2, 5, 3, 6) and shiftNTimes(array(6, 2, 5, 3), 2)

// changes the array argument to (5, 3, 6, 2). You must modify the array argument by

// changing the parameter array inside method shiftNTimes. A change to the

// parameter inside the method shiftNTimes changes the argument if the

// argument is passed by reference, that means it is preceded by an ampersand &

//

// shiftNTimes( array(1, 2, 3, 4, 5, 6, 7), 3 ) modifies array to ( 4, 5, 6, 7, 1, 2, 3 )

// shiftNTimes( array(1, 2, 3), 5) modifies array to (3, 1, 2)

// shiftNTimes( array(3), 5) modifies array to (3)

//

**function** *shiftNTimes*(& $array,
$numShifts) {

}

$arr = **array** (

1,

2,

3,

4 );

*shiftNTimes* ( $arr, 2 );

*assert*(3 == $arr[0]);

*assert*(4 == $arr[1]);

**echo** *PHP_EOL* . 'shiftNTimes(array(1,
2, 3, 4), 2)' . "\n";

// Use print_r to see all array elements on separate lines

*print_r* ( $arr );

?>

Answer #1

<?php

function shiftNTimes(& $array, $numShifts) {

$temp=[];//create a temp array

$len=sizeof($array);

for($i=0; $i<$numShifts; $i++)

{

$temp[$i]=$array[$i];

}

for($i=$numShifts; $i<$len; $i++)

{

$array[$i-$numShifts]=$array[$i];

}

for($i=0; $i<$numShifts; $i++)

{

$array[$len-$numShifts+$i]=$temp[$i];

}

print_r($array);

}

$arr = array (

1,

2,

3,

4

);

assert(3 == $arr[0]);

assert(4 == $arr[1]);

$a = readline('Enter the digit upto which you want to leftshift:
');

echo $a;

echo PHP_EOL . 'shiftNTimes(array(1, 2, 3, 4),'. $a.' )' . "\n";

// Use print_r to see all array elements on separate lines

print_r ( $arr );

shiftNTimes ( $arr, $a );

?>

//fell free to ask any questions

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//
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