anonymous-function

问题 I was reading some posts about closures and saw this everywhere, but there is no clear explanation how it works - everytime I was just told to use it...: // Create a new anonymous function, to use as a wrapper (function(){ // The variable that would, normally, be global var msg = "Thanks for visiting!"; // Binding a new function to a global object window.onunload = function(){ // Which uses the 'hidden' variable alert( msg ); }; // Close off the anonymous function and execute it })(); Ok I

问题 Are anonymous methods defined inline ? In the example below, the delegate object "d" is having reference of an anonymous method, which is accessing "x" variable which is defined in the Fun method. The scope of "x" should be limited to Fun method, but when we call MyFun, which invokes the delegate passed as parameter and increments the value of "x". The output comes out to be "6", how does this happen ? How the value of "x", or in first place "x" variable itself was available in the anonymous

问题 I have the following class with static variables. How can I access the static functions of a class from within an anonymous PHP function? class MyClass { public static function MyFunction(mylocalparam){ MyStaticClass:MyStaticMethod(function(myparam) use(mylocalparam){ MyClass::MyFunction2(mylocalparam); }); } private static function MyFunction2(someobject){ } } I am having trouble accessing the function "MyFunction2" from within the anonymous class. Could you please advice on how to rectify

问题 I have the following class with static variables. How can I access the static functions of a class from within an anonymous PHP function? class MyClass { public static function MyFunction(mylocalparam){ MyStaticClass:MyStaticMethod(function(myparam) use(mylocalparam){ MyClass::MyFunction2(mylocalparam); }); } private static function MyFunction2(someobject){ } } I am having trouble accessing the function "MyFunction2" from within the anonymous class. Could you please advice on how to rectify

问题 I have N functions in MATLAB and I can define them using strcat , num2str and eval in a for loop. So without defining by hand I am able to define N functions. Let N=4 and let them be given as follows: f1=@(x) a1*x+1; f2=@(x) a2*x+1; f3=@(x) a3*x+1; f4=@(x) a4*x+1; Now I add these four functions and I can do this by hand as follows: f=@(x)(f1(x)+f2(x)+f3(x)+f4(x)); Here I can do it by hand because I know that N=4 . However, in general I never know how many functions I will have. For all cases

问题 Just wondering why something like this doesn't work: public function address($name){ if(!isset($this->addresses[$name])){ $address = new stdClass(); $address->city = function($class = '', $style = ''){ return $class; }; $this->addresses[$name] = $address; } return $this->addresses[$name]; } Calling it like echo $class->address('name')->city('Class') should just echo Class , however I get Fatal error: Call to undefined method stdClass::city() I can find a better way to do this, because this

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: What are the benefits to using anonymous functions instead of named functions for callbacks and paramaters in JavaScript event code? I've been reading/writing some basic Javascript and JQuery code and noticed that in almost every tutorial that I read, anonymous functions are used instead of named functions. For example, something like: $('document').ready(function(){ alert("I am ready."); }); versus: function

问题 I am doing a school task where I am given a small bit of sample code which I can use later. I understand 90% of this code but there is one little line/function that I for the life of me can't figure out what it does (I am very new to Haskell btw). Sample code: data Profile = Profile {matrix::[[(Char,Int)]], moleType::SeqType, nrOfSeqs::Int, nm::String} deriving (Show) nucleotides = "ACGT" aminoacids = sort "ARNDCEQGHILKMFPSTWYVX" makeProfileMatrix :: [MolSeq] -> [[(Char, Int)]]

问题 Can I create an anonymous function that accepts a variable number of arguments? I have a struct array S with a certain field, say, bar , and I want to pass all the bar values to my anonymous function foo . Since the number of elements in struct S is unknown, foo must be able to accept a variable number of arguments. The closest thing that I've been able to come up with is passing a cell array as the input argument list: foo({arg1, arg2, arg3, ...}) and I'm invoking it with foo({S.bar}) , but

问题 Can I create an anonymous function that accepts a variable number of arguments? I have a struct array S with a certain field, say, bar , and I want to pass all the bar values to my anonymous function foo . Since the number of elements in struct S is unknown, foo must be able to accept a variable number of arguments. The closest thing that I've been able to come up with is passing a cell array as the input argument list: foo({arg1, arg2, arg3, ...}) and I'm invoking it with foo({S.bar}) , but