People, out there must be giving some interview and find a hard time understanding technical question that comes to them. I will start with the most basic tests. Let's consider the below task:
Write a function:
function solution($array);
that, given an array a $array of N integers, which returns the smallest positive integer that does not occur in a $array variable. return must be greater than 0.
For example, given $array = [1, 2, 6, 4, 4, 3], the function should return 5.
Given A = [1, 2, 3], the function should return 4.
Given A = [−1, −3], the function should return 1.
Assuming:
Check out the below Code for solution:
function solution($array) {
$low = 1;
// Get the lowest value in array
$min = min($array);
// Get the largest value in array
$max = max($array);
// run the loop from minimal to maximum value
for($i = 1;$i<=$max;$i++) {
// Check if current index is the last value or max value of assumption.
if(count($array) != $i || $i > 100000) {
// Check if the current index exists in array or not, if it doesn't then return
if(!in_array($i, $array)) {
return $i;
}
} else {
// if count is equal or max, return value with +1
return $i > 1 && !in_array(1, $array) ? 1 : $i + 1;
}
}
return $low;
}
I hope, the comment will help you easier to understand the above code.
Any question asks them below.
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