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<?php |
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namespace Aerophant\Ramda; |
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/** |
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* @param int $a |
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* @param int $b |
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* @return int |
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*/ |
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function add() |
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{ |
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$add = function (int $a, int $b) { |
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return $a + $b; |
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}; |
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$arguments = func_get_args(); |
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$curried = curryN($add, 2); |
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return call_user_func_array($curried, $arguments); |
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} |
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/** |
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* @param mixed $data |
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* @return \Closure |
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*/ |
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function always() |
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{ |
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$always = function ($data) { |
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return function () use ($data) { |
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return $data; |
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}; |
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}; |
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$arguments = func_get_args(); |
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$curried = curryN($always, 1); |
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return call_user_func_array($curried, $arguments); |
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} |
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/** |
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* @return callable |
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* @throws \Exception |
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*/ |
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function compose() |
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{ |
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$arguments = array_reverse(func_get_args()); |
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return call_user_func_array('Aerophant\Ramda\pipe', $arguments); |
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} |
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function curryN(callable $fn, int $numberOfArguments) |
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{ |
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return function () use ($fn, $numberOfArguments) { |
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$arguments = func_get_args(); |
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$length = count($arguments); |
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if ($length > $numberOfArguments) { |
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throw new \InvalidArgumentException( |
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"Number of passed($length) parameters is greater than expected($numberOfArguments)" |
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); |
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} |
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// NO CURRY |
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if ($length == $numberOfArguments) { |
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return call_user_func_array($fn, $arguments); |
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} |
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// AUTO CURRY |
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$curriedFn = function () use ($fn, $arguments) { |
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$curriedArguments = func_get_args(); |
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return call_user_func_array($fn, array_merge($arguments, $curriedArguments)); |
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}; |
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return curryN($curriedFn, $numberOfArguments - $length); |
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}; |
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} |
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//TODO change to construct |
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function factory($class) |
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{ |
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return function () use ($class) { |
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return new $class(); |
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}; |
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} |
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/** |
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* @return callable |
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* @throws \Exception |
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*/ |
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function pipe() |
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{ |
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$arguments = func_get_args(); |
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$length = count($arguments); |
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if ($length === 0) { |
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throw new \Exception("pipe requires at least one argument"); |
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} |
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return function () use ($arguments) { |
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$internalArguments = func_get_args(); |
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$initialValue = call_user_func_array($arguments[0], $internalArguments); |
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$accumulator = function ($acc, $it) { |
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return call_user_func_array($it, [$acc]); |
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}; |
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return array_reduce(drop(0, $arguments), $accumulator, $initialValue); |
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}; |
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} |
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aerophant /
ramda
