unyx / utils

            foreach ($this->components as $i => $component) {

                $result[$i] = $component + $that->components[$i];

            }

        } elseif (is_numeric($that)) {

            // We're accepting all numeric values but will be casting to a float, so be aware of potential

            // precision loss.

            $that = (float) $that;

            foreach ($this->components as $i => $component) {

                $result[$i] = $component + $that;

            }

        } else {

            throw new \InvalidArgumentException('Unknown type to add given - can only add other Vectors or numbers to Vectors.');

        }

            foreach ($this->components as $i => $component) {

                $result[$i] = $component - $that->components[$i];

            }

        } elseif (is_numeric($that)) {

            // We're accepting all numeric values but will be casting to a float, so be aware of potential

            // precision loss.

            $that = (float) $that;

            foreach ($this->components as $i => $component) {

                $result[$i] = $component - $that;

            }

        } else {

            throw new \InvalidArgumentException('Expected a Vector or a number to subtract, got ['.diagnostics\Debug::getTypeName($that).'] instead.');

        }