ValidPalindrome::isPalindrome() - Code Metrics - Inspection of "Add valid-palindrome solution" - imajinyun/leetcode-php - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

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by Jinyun

created 2021-08-24 01:15 UTC

ValidPalindrome::isPalindrome() A

↳ Parent: ValidPalindrome

Complexity

Conditions	4
Paths	4

Size

Total Lines	14
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	7
c	1
b	0
f	0
dl	0
loc	14
rs	10
cc	4
nc	4
nop	1

<?php

declare(strict_types=1);

namespace leetcode;

class ValidPalindrome
{
    public static function isPalindrome(string $s): bool
    {
        if (0 === ($n = strlen($s))) {
            return true;
        }
        $ans = [];
        for ($i = 0; $i < $n; $i++) {
            // Can also use ctype_alnum instead.
            if (preg_match('/^[a-zA-Z0-9]$/', $s[$i])) {
                array_push($ans, strtolower($s[$i]));
            }
        }

        return $ans === array_reverse($ans);
    }

    public static function isPalindrome2(string $s): bool
    {
        if (empty($s)) {
            return true;
        }
        [$i, $j] = [0, strlen($s) - 1];
        while ($i < $j) {
            if (!ctype_alnum($s[$i])) {
                $i++;
            } elseif (!ctype_alnum($s[$j])) {
                $j--;
            } elseif (strtolower($s[$i]) !== strtolower($s[$j])) {
                return false;
            } else {
                $i++;
                $j--;
            }
        }

        return true;
    }

    public static function isPalindrome3(string $s): bool
    {
        if (empty($s)) {
            return true;
        }
        $s = strtolower($s);
        [$i, $j] = [0, strlen($s) - 1];
        while ($i < $j) {
            if (!ctype_alnum($s[$i])) {
                $i++;
            }
            if (!ctype_alnum($s[$j])) {
                $j--;
            }
            if (ctype_alnum($s[$i]) && ctype_alnum($s[$j])) {
                if ($s[$i] !== $s[$j]) {
                    return false;
                }
                $i++;
                $j--;
            }
        }

        return true;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace leetcode;
6
7			class ValidPalindrome
8			{
9			public static function isPalindrome(string $s): bool
10			{
11			if (0 === ($n = strlen($s))) {
12			return true;
13			}
14			$ans = [];
15			for ($i = 0; $i < $n; $i++) {
16			// Can also use ctype_alnum instead.
17			if (preg_match('/^[a-zA-Z0-9]$/', $s[$i])) {
18			array_push($ans, strtolower($s[$i]));
19			}
20			}
21
22			return $ans === array_reverse($ans);
23			}
24
25			public static function isPalindrome2(string $s): bool
26			{
27			if (empty($s)) {
28			return true;
29			}
30			[$i, $j] = [0, strlen($s) - 1];
31			while ($i < $j) {
32			if (!ctype_alnum($s[$i])) {
33			$i++;
34			} elseif (!ctype_alnum($s[$j])) {
35			$j--;
36			} elseif (strtolower($s[$i]) !== strtolower($s[$j])) {
37			return false;
38			} else {
39			$i++;
40			$j--;
41			}
42			}
43
44			return true;
45			}
46
47			public static function isPalindrome3(string $s): bool
48			{
49			if (empty($s)) {
50			return true;
51			}
52			$s = strtolower($s);
53			[$i, $j] = [0, strlen($s) - 1];
54			while ($i < $j) {
55			if (!ctype_alnum($s[$i])) {
56			$i++;
57			}
58			if (!ctype_alnum($s[$j])) {
59			$j--;
60			}
61			if (ctype_alnum($s[$i]) && ctype_alnum($s[$j])) {
62			if ($s[$i] !== $s[$j]) {
63			return false;
64			}
65			$i++;
66			$j--;
67			}
68			}
69
70			return true;
71			}
72			}
73

imajinyun / leetcode-php

Push — master ( c6e15f...aeb9a7 )

ValidPalindrome::isPalindrome() A

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