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 use map:

const newImages = this.state.images
  .map((image, index) => index === 4 ? updatedImage : image)