parameters

问题 I want to convert the arguments to a function into an associative array with keys equal to the parameter variable names, and values equal to the parameter values. PHP: function my_function($a, $b, $c) { // <--- magic goes here to create the $params array var_dump($params['a'] === $a); // Should result in bool(true) var_dump($params['b'] === $b); // Should result in bool(true) var_dump($params['c'] === $c); // Should result in bool(true) } How can I do this? 回答1: The you can do this using

问题 My code needs some function pointer types like /** * \brief Callback function type "foo" */ typedef int (*foo)(int a, int b); I would like to document the semantics of the function arguments, but a \param[in,out] next to the \brief statement does not seem to add extra documentation. Is there a way to get doxygen add parameter documentation to function type-defs? TIA for any help! 回答1: It is not clear from your question what exactly you tried when you placed \param. The following works for me

问题 In the parameters.yml file there is a parameter named secret which defaults to ThisTokenIsNotSoSecretChangeIt but it should be changed to something else. What happens if the value of this parameter is changed in production? Can it break anything? 回答1: It does not break anything. Changing the value secret parameter from time to time is even considered a good practice, suggested by the official documentation: http://symfony.com/doc/current/reference/configuration/framework.html#secret The only

问题 I'm redirecting to https like so: redirect_to :protocol => 'https://', :status => :moved_permanently However, the parameters don't go through like this. I can pass specific parameters through like this: redirect_to :protocol => 'https://', :status => :moved_permanently, :param1 => params[:param1], :param2 => params[:param2] How would I make it so that it just passes through every parameter on the url instead of having to explicitly declare each parameter? 回答1: Figured it out: redirect_to({

问题 In Haskell you can write: x :: (Int,Int) -> Int x (p,s) = p In Scala you would write: def x(a: (Int, Int)) = a._1 or: def x(a: (Int, Int)) = a match { case (p, s) => p } Why not have something like def x(_: (p: Int, s: Int)) = p or def x(foo: (p @ Int, s @ Int)) = p ? 回答1: The feature you're looking for is called destructuring and, in it's general form, would go well beyond just tuple unpacking. I've often found myself wishing that Scala had it since it's such a natural extension of the

问题 I am sure I read somewhere that there is an easy way to pass named parameters from a calling function to a called function without explicitly naming and specifying each parameter. This is more than just reusing the position; I'm interested in the case where the name of the passed parameters is the same in some cases, but not in others. I also think there is a way that is not dependent on position. function called-func { param([string]$foo, [string]$baz, [string]$bar) write-debug $baz write

问题 This question already has answers here : How can I get query string values in JavaScript? (73 answers) Closed 6 years ago . I have a form that uses the get method and contains an array: http://www.example.com?name[]=hello&name[]=world I'm trying to retrieve array values 'hello' and 'world' using JavaScript or jQuery. I've had a look at similar solutions on Stack Overflow (e.g. How can I get query string values in JavaScript?) but they seem to only deal with parameters rather than arrays. Is

问题 I already read up about passing by reference and so procedure test(var x:integer); begin x:=x+5; end; so the above code updates 5 by reference. I assumed if I was updating an array by reference I could declare var X: array of blah ... having some bound bugs and just wanted to know if I should be using the type of data for the pointer to the data or if the pointer is always int... just so I know if it's how I'm doing my passing by reference or something else in my code that is the issue. 回答1:

问题 It is in ScalaDoc but without much documentation. It seems that it always returns the first parameter. Function.const(1)(2) for instance returns 1 . Why does it exist and why is it useful? 回答1: To give a more theoretical answer: const is the K combinator of the SKI calculus. It pops sometimes up when you work with quite abstract concepts where you don't have much "to work with". Consider a (Haskell style) Functor trait: trait Functor[F[_]] { def fmap[A,B](f:A=>B, fa: F[A]):F[B] //(<$) in

问题 I have the same question but...I'm redirecting the user depending on an if statement using headers to a dynamic page that is constructed through a function. For that function to work properly, it needs the parameters passed in the GET portion of the headers. According to what to the answers provided, this is a bad practice. What way should I be doing it? function page($title,$msg){ $title = $_GET['title']; $msg = $_GET['msg']; echo '<h1>'.$title.'</h1>'; echo '<p>'; switch($msg){ case 1: echo