Why can’t I output outside the function here, why does it need to be inside? Answer Because if it were where you’ve shown in the question, the value would be 0. The code runs immediately on page load, it doesn’t wait for something to call countJar. Where it is now, it doesn’t run until countJar is called. If you mean you can’t even see 0 when you try to put it there, that would be because the id=”demo” element doesn’t exist yet. If that’s what you mean, this question’s answers apply.
Learning JS from MDN Docs came across code in “functions section”. Not able to understand what does return; in the below code accomplish Output I understood first 5 lines of output, but not able to understand why end: 0,1,2,3 are coming? Please help ! Answer return terminates the current function, and returns control flow to the caller. When foo(3); is called, the function is initialized with an i parameter of 3. It fails the if statement, prints begin: 3, and then calls foo(3 – 1);. At this point, the current function (the one with an i parameter of 3) is
I tried to make one filter for both collectors but still have to type this (x,y,z) => filter(x,y,z,’âª’) Answer You can make a higher-order function, one that takes in the character you’re looking for and returns a function that takes three arguments (reaction, user, and c, corresponding to your current (x, y, x) =>) and returns the appropriate filter operation. Also, it doesn’t look like c (same as z) is being used at all in any code here, so feel free to remove it from the argument list.
I already know that apply and call are similar functions which setthis (context of a function). The difference is with the way we send the arguments (manual vs array) Question: But when should I use the bind() method ? jsbin Answer I created this comparison between function objects, function calls, call/apply and bind a while ago: .bind allows you to set the this value now while allowing you to execute the function in the future, because it returns a new function object.