This question already has an answer here: Access variables from parent scope in anonymous PHP function 1 answer There is an example in the Cookbook: $query = $cities->find() ->where(function ($exp, $q) { return $exp->notIn('country_id', ['AFG', '
In his article on let and const Jason Orendorff states the following: Crunchy performance details: In most cases, you can tell whether the declaration has run or not just by looking at the code, so the JavaScript engine does not actually need to perf
In the below example we read from a JSON data and store it in a variable. Then we loop through it to print out the value of each of its iteration. I have "cartList.innerHTML" which will list out "Edit" 4 times as that is the number of
I have a SettingsViewController and have created a struct to define the information required for each setting. ///Represents a list of the options needed to populate a `SettingsTableViewCell` public struct Setting { ///The image to use for the icon v
Right below the second comment, I receive an error of "Result of call to 'taskForDeleteMethod' is unused. Why is this when I use the results and error in the closure following the call? func deleteSession(_ completionHandlerForDeleteSession: @escapin
function sum(a) { var sum = a function f(b) { sum += b return f } f.toString = function () { return sum } return f } var a = sum(0)(1)(2)(3)(4)(5); Can someone explain to me how does this code works? I really don't get how to call function with multi
I am going through a book on Javascript and tried one of its example of closure. function animateIt(id) { var elem= document.getElementById(id); var tick=0; var timer=setInterval(function() { if (tick<100) { elem.style.left = tick+"px"; elem.
I am trying to understand closures. In the code below, I create an instance of the constructor function Ninja and I call the instance kawazaki. I expected to be able to access the methods of Ninja. However, I am getting a TypeError: Object #<Ninja>
I am trying to resolve a closure based strong reference cycle in Swift. In the code below, object is retained by the owning view controller. ProgressHUD is a UIView that's also retained by the owning view controller. ProgressHUD is leaked every time
This question already has an answer here: Explain the encapsulated anonymous function syntax 8 answers Javascript anonymous function call [duplicate] 4 answers Very straight-forward, so the question is why (function(){ console.log('a'); }()); // 'a'
let asdf = { println("df") for i in 1...10 { } } Can not convert expression's type '() -> () -> ST0' to type '() -> () -> ST0' What is the problem with upper closure. If I remove for loop it will work.Not sure why that syntax doesn't
I understand functional programming well. I want to create a list of functions that each selects a different element of a list. I have reduced my problem to a simple example. Surely this is a Python bug: fun_list = [] for i in range(5): def fun(e): r
I have a javascript function which contains another javascript function inside (closure) function function1() { $("button").bind("click", function () { function2(); }); function function2() { // code }; }; My question: When i call func
Currently I've got the following: function bar() { // Do fancy D3 stuff here function update(source) { // Do fancy D3 update } } I call bar() on the click of a button, but I'm going to need to have access to update() (as well as passing that an argum
I would really like to do this: var Html = function() { alert('internal: ' + this.val); }; Html.val = "x"; alert('external: ' + Html.val); Html(); but it doesn't work. why? how can I get the function code to see values set after its creation? -
I using a nice trick to check if an async loaded javascript file with a function myFunction exists. The trick is a closure using arguments.callee: (function() { if(typeof myFunction === "undefined") { console.log("not loaded"); setTime
I have this code, which works as I wanted but I don't understand exactly why. Thinking about a stack in C, C++, I'd guess that the p variable will be on the stack on each call, and then erased when the method returns. How does the closure of the thre
I'm learning javascript closure,I have read many examples about closure,but i still confused in why we must be use closure? here is an example i copied from "The Good Parts" var myObject = function(){ var value = 0; return { increment: function(
I currently have the following: (defun my-hide-code () (interactive) (set-selective-display 2)) (defvar my-keys-minor-mode-map (make-keymap) "my-keys-minor-mode keymap.") (define-key my-keys-minor-mode-map (kbd "<f2>") 'my-hide-c
I've been recently playing with Groovy and have messed around with JRuby before and appreciate using the .each{} closure in their collections. That said, I cannot help but feel that this is nothing but syntactic sugar for a visitor pattern. If you en
i want to create n number of EditText objects ...so i m using LayoutInflater to do that in a loop which runs till n ...The views are added to the layout but if i want to add a addTextChangeListener to each of the EditText objects , the listener is ad
If I use a closure to define something is there a means of waiting so to speak until the variable is populated before moving on to the next bit. Example: var myVari = someFunction(); $.each(myVari, function(){/*code for each*/}); the function that de
for example: //global vars var g1,g2,g3; function a(p1,p2,p3){ //local vars var a1,a2,a3; return function(){ //an embed function, looks like dynamic defined at runtime } } var f1 = a(1,2,3) var f2 = a(4,5,6) f1() f2() my question is , is f1 and f2 po
Is it possible to pass an anonymous function as an argument, and have it execute immediately, thus passing the function's return value? function myFunction(Array $data){ print_r($data); } myFunction(function(){ $data = array( 'fruit' => 'apple', 'veg
I'm using mootools: I can't figure out how to use a variable when using an addEvent. I want to use a for next loop to set values in a loop: for (x=0;x<num;x++){ var onclickText = 'function (){onclick="addPageMoveEvent('+x+'"); }'; $('pageNum'
I am trying to create and array of objects so that I can access them in a for loop in jQuery and I know that this works in Actionscript so what I am trying to do is convert my current knowledge to jQuery that will work. Please have a look at this and
suppose i have a file name "test.lua" containing lines below: --[[ test.lua --]] local f = function() print"local function f in test.lua" end f_generate = function() local fun = loadstring(" f()") -- local env = getfenv(1) --
I asked a question about callbacks and arrived at another question (see comment). How is a closure different from a callback?Check the introduction in this: http://jibbering.com/faq/faq_notes/closures.html. It can help you understand better how closu
Just a general question about what the best practice is: public void Foo() { int x = 5; myControl.Click += (o, e) => { x = 6; }; } Notice, I'm using the x variable inside my lambda event handler. OR: public class Bar { private int x = 5; public void
Yesterday @headius / Charles Nutter came up with a very interesting idea on twitter: @danny_l Gafter made the same mistake; I don't mean a forked Java any more than Groovy is a fork. I want a "mostly Java" with closures. or the reply by @danny_l
