ЯсноПонятно24

In the code provided, the function getDistance calculates the Euclidean distance between two points given as arrays. The function getTheNearestLocation takes an array of locations (each location consisting of a name and a point) and a current point, and returns the location that is nearest to the current point based on Euclidean distance.

To improve the code, we can make the following suggestions:

1. Use more descriptive variable names: Instead of using generic variable names like $xs, $ys, and $distance, consider using more descriptive names that indicate their purpose or meaning in the context of the code.

2. Use the pow function instead of the ** operator: Instead of using the ** operator for exponentiation, consider using the pow function for better readability and consistency.

3. Use the null coalescing operator (??) for default values: Instead of explicitly checking if the $locations array is empty and returning null, you can use the null coalescing operator ?? to provide a default value if the array is empty.

4. Consider using type hints for function parameters: Adding type hints for function parameters can improve code clarity and help prevent unexpected data types from being passed to the functions.

Here is an updated version of the code with these suggestions implemented:

function getDistance(array $point1, array $point2): float
{
    [$x1, $y1] = $point1;
    [$x2, $y2] = $point2;

    $deltaX = $x2 - $x1;
    $deltaY = $y2 - $y1;

    return sqrt(pow($deltaX, 2) + pow($deltaY, 2));
}

function getTheNearestLocation(array $locations, array $currentPoint): ?array
{
    $nearestLocation = null;
    $lowestDistance = PHP_FLOAT_MAX;

    foreach ($locations as $location) {
        [, $point] = $location;
        $distance = getDistance($currentPoint, $point);

        if ($distance < $lowestDistance) {
            $lowestDistance = $distance;
            $nearestLocation = $location;
        }
    }

    return $nearestLocation;
}

By making these improvements, the code will be more readable, maintainable, and robust.