Say I have function foo(args) {...} where args is an array of 2-tuples such that the entries within the tuple are the same type (i.e. [T,T]), but the entries across tuples may vary arbitrarily (i.e. [[T,T],[U,U],[V,V]]). For example: foo([ [1,…
I have an array object i want to change the value of isFavorite to true only in second level (where name is pear) i tried map function but that is changing value on every level and i have written that…
Good afternoon I'm trying to merge 2 object by assigning some values to a number of element the other number to another number of elements. I managed to create some thing but it places some on the wrong position an…
I have nested array object and need to display as table format using react. I tried below code and got stuck how to display as such var countdetails = [ { enabled: { IN: 354, MY: 181 }, pending: {…
I am learning JS and have a task to complete which is quite confusing. The task is to giving a index to start from and include the remainders or the the items missing in the array, as well as to…
I tried to create an array of HtmlImageElement using a map on an other array. const foo = Array(5).map(() => new Image()) And I got an array full of empty object Why is that ? Thanks ! Edit : It…
I simply do this: const ar = [1, 2, 3]; ar.reduce(Math.max, 0); // returns NaN ar.reduce((a, c) => Math.max(a, c), 0); // returns 3 as expected Any reason for this behaviour?
I have a list of athlete names in JSON format from a fetch. Using for loop, I want to grab all the names under roster > athlete > name and then inserting them into dropdown menu. But for some reason…
The goal is to add items into the input box and display them in the paragraph below it. But page disappears after the items are displayed. I need the page to stay the way it is and not disappear. Bellow…
I am trying to sort an array of objects and the sorting will be done based on property which will be dynamic I have an array const fruitDetails = [ {item: "Berry", qty: "651042446", stockDate: "2021-09-20"}, {item: "Apple", qty: "23222",…