| public __construct ( array $coefficients, $variable = "x" ) | ||
| $coefficients | array | An array of coefficients in decreasing powers. Example: new Polynomial([1, 2, 3]) will create a polynomial that looks like x² + 2x + 3. |
public function __construct(array $coefficients, $variable = "x")
{
// Remove coefficients that are leading zeros
for ($i = 0; $i < count($coefficients); $i++) {
if ($coefficients[$i] != 0) {
break;
}
unset($coefficients[$i]);
}
// If coefficients remain, re-index them. Otherwise return [0] for p(x) = 0
$coefficients = $coefficients != [] ? array_values($coefficients) : [0];
$this->degree = count($coefficients) - 1;
$this->coefficients = $coefficients;
$this->variable = $variable;
}