/*
Compare two float arrays element-by-element for exact equality.
Floating‑point values must match exactly; even tiny rounding
differences will cause inequality. This is stricter than using
a tolerance-based comparison.
*/
/*
Compares two float arrays and returns true only if all elements
are exactly equal. Direct == comparison checks for exact binary equality.
*/
function compareFloatArraysExact(array $a, array $b): bool
{
// If lengths differ, arrays cannot be equal
if (count($a) !== count($b)) {
return false;
}
// Compare each element directly
for ($i = 0; $i < count($a); $i++) {
if ($a[$i] !== $b[$i]) {
return false; // Found mismatch → arrays differ
}
}
// All elements matched exactly
return true;
}
/*
Prints the comparison result.
*/
function printComparison(bool $result): void
{
if ($result) {
echo "Arrays are exactly equal.\n";
} else {
echo "Arrays differ.\n";
}
}
// Example arrays
$floatArr1 = [
12314.9872,
3.14,
12387.91834,
8873.579013
];
$floatArr2 = [
12314.9872,
3.14,
12387.91834,
8873.579013
];
// Perform exact comparison
$result = compareFloatArraysExact($floatArr1, $floatArr2);
// Output result
printComparison($result);
/*
run:
Arrays are exactly equal.
*/
