Lit\Air\Utils::isSequentialArray()

Complexity

Conditions	9
Paths	8

Size

Total Lines	29
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	90

Importance

Changes	1
Bugs	0	Features	0

<?php
    public static function isSequentialArray($val, ?int $expectedLength = null): bool
    {
        if (!is_array($val)) {
            return false;
        }

        $cnt = count($val);
        if ($cnt === 0) {
            return $expectedLength === null || $expectedLength === 0;
        }

        // non-empty sequential array must have zero index, fast exit for 99% assoc arrays
        if (!array_key_exists(0, $val)) {
            return false;
        }

        // fast exit for length assertion
        if ($expectedLength !== null && $expectedLength !== $cnt) {
            return false;
        }

        $idx = 0;
        foreach ($val as $k => $v) {
            if ($k !== $idx++) {
                return false;
            }
        }

        return true;
    }