How to filter using array index in react?

Curriculum Help
1

let deleteLi = newlist.filter(y => y.index === i)

2

Second argument to the callback is the index

newlist.filter((item, index) => index === i)
3

But you often don’t want to mutate arrays /objects in React/Redux. This is how you can also do it:

let arr = [
  'apple',
  'banana',
  'coke',
];

const i = 1;

console.log(arr);
// ["apple", "banana", "coke"]

arr = [...arr.slice(0, i), ...arr.slice(i + 1)]

console.log(arr);
// ["apple", "coke"]
4

Sorry, I misspoke. I had splice on my brain. Of course filter doesn’t mutate. But I think filter is kind of a clumsy way to remove an item at an index, especially if you are dealing with a vary large array - filtering through every single element.

5

Thanks. I found the sol…
let deleteLi = newlist.filter((x, index, arr)=>{

 //arr[index]!==i

 return index!==i

})

setGroupUsers(deleteLi)