I’m learning JavaScript and I understand the general function types, closures, etc. But with IIFEs my initial reaction was “if its immediately invoked, why not just inline it”. So I went and read this article that describes “4 Practical Use Cases” for IIFEs. However, two of which are related to circumventing the scoping issues that come with vars (which are
Tag: closures
implement a memoization function in JavaScript [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last month. Improve this question The function that I need to implement should take a function to memoize, then return a new function that remembers the inputs to the supplied function.
Is this the correct recursive way to write curry function?
I can’t understand if this recursive curry function is correct or not. I have curry function implement with binding but I am not sure why it works and recursive does not. Can you help me to understand this, I think my context understanding in this functions is incorrect Answer Your curring is correct, the problem is with this.multiplier. When you
calling a function outside of the function call in which it was defined
I am trying to log myNewFunction(),and the results shows undefined. Answer I am trying to log myNewFunction(),and the results shows undefined. Because myNewFunction, which is the same as incrementCounter doesn’t return anything: If there is no explicit return statement, a function returns undefined. If you want it to return the new value of counter then do that.
Stale closures with react hooks and click events
I have created a codesandbox for easier debugging: https://codesandbox.io/s/hardcore-dirac-nh4iz?file=/src/App.tsx I have built a DataList component that I use like: All of the functionality is handled inside of a useListBox hook, which includes taking the onSelect prop from each child and binding that to a click event on the List itself. However, a stale closure is preventing the count value from
What is the flow of execution with this compose function passed into Javascripts reduce?
I just want to know how reduce works in the case of code below(which was provided by a stackoverflow user in my previous question, i’m asking this question as his code snippet led to me having more questions that weren’t cleared up and are too long to fit in a comment section). An array of functions is passed into a
Javascript function challenge add(1,2) and add(1)(2) both should return 3
A friend of mine challenged me to write a function that works with both of these scenarios My instinct was the write an add() function that returns itself but I’m not sure I’m heading in the right direction. This failed. So I started reading up on functions that return other functions or return themselves. http://davidwalsh.name/javascript-functions JavaScript: self-calling function returns a
Javascript closures on heap or stack?
Where does JavaScript (according to the standard) store closures: heap or stack? Is there a third explicit place for closures? Answer In the end it is an implementation detail of the runtime. See Phoenix link As to implementations, for storing local variables after the context is destroyed, the stack-based implementation is not fit any more (because it contradicts the definition