When using a for of loop, both of these are allowed and work: const numbers = [1,2,3]; // works for(let number of numbers) { console.log(number); } // also works for(const number of numbers) { co...

I am using ESLint for my ES6 program, with the AirBNB rule-set. For good and adequate reasons, I am using the for...of construction in my code, but ESLint objects to it, issuing a no-restricted-syn...

I am building an Array with const myCanvas = document.getElementsByTagName('canvas') that it's actually working. It returns me something like this: images: [ 0: canvas, 1: canvas, 2: canvas ] T...

We can access array elements using a for-of loop: for (const j of [1, 2, 3, 4, 5]) { console.log(j); } How can I modify this code to access the current index too? I want to achieve this ...

Is it possible to loop over part of an iterator with for...of without closing the iterator when I break the loop? Example: function* numbers(i=0){ while(true) yield i++; } let nums=numbers();...

Take a close look at code function* NinjaGenerator() { yield "yoshi"; return "Hattori"; } for (let ninja of NinjaGenerator()) { console.log(ninja); } // console log : yoshi Why "...

Are these two the same or interchangeable? What are some use cases that someone would choose one over the other? for(let i of array){some code} for(let i = 0; i < array.length; i++){some cod...

I am coming across terms Iterable and Enumerable while studying For/in and For/of loops. Objects are supposed be enumerable and we have to use For/in loop to loop over the properties of the object ...

I'm looking for a a way to iterate over a Set or Map in reverse order. Consider this simple example in regular order: var mySet = new Set([1,2,3,4,5]); for(let myNum of mySet) { console.log(myNu...

I accidentally witnessed that this causes an error in V8 (Chrome, Node.js, etc): for (let val of Symbol()) { /*...*/ } TypeError: Symbol is not a function or its return value is not iterable It ...

I'm trying to edit an array and remove elements that do not meet a certain condition. If I use a reverse for loop combined with .splice(index,n), the code works just fine. I'm stuck at implementing...

Can I use the break and continue statements inside the for...in and for...of type of loops? Or are they only accessible inside regular for loops. Example: myObject = { propA: 'foo', propB: 'b...

could someone explain to me how exactly map.entries() and destructuring work? var numbers = new Map() numbers.set(1,'one') numbers.set(2,'two') numbers.set(3,'three') numbers.set(4,'four') ...

So my IDE doesn't like when I use a for..in loop to iterate over an object keys. I get a warning: Possible iteration over unexpected (custom / inherited) members, probably missing hasOwnProperty...

I would like to set the options[Symbol.iterator] property in order to iterate on the simple objects I create with the for...of statement : options = { male: 'John', female: 'Gina', rel: ...