<?php
namespace eMacros\Runtime\Arithmetic;
use eMacros\Runtime\GenericFunction;
class Division extends GenericFunction {
/**
* Obtains the result of dividing the first element on a list by the rest of the elements.
* Usage: (/ 4 2)
* Special case: (/ 5) = 1/5
* Returns: number
* (non-PHPdoc)
* @see \eMacros\Runtime\GenericFunction::execute()
*/
public function execute(array $arguments) {
if (empty($arguments)) {
//no parameters
throw new \InvalidArgumentException("Division: At least 1 argument is required.");
}
//emulate CLISP: (/ 4) = 1/4
if (!isset($arguments[1])) {
return 1 / $arguments[0];
}
//get first value
$result = array_shift($arguments);
foreach ($arguments as $value) {
$result /= $value;
}
return $result;
}
}
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