Replace array entry with spread syntax in one line of code?

Question

I\'m replacing an item in a react state array by using the ... spread syntax. This works:

let newImages = [...this.state.images]
newImages[4] = updatedImage
this         


        

Answer 1

You can convert the array to objects (the ...array1), replace the item (the [1]:"seven"), then convert it back to an array (Object.values) :

array1 = ["one", "two", "three"];
array2 = Object.values({...array1, [1]:"seven"});
console.log(array1);
console.log(array2);