Array mutation utility methods

array-mutation-utils.ts

export const replaceItemInList = (
  item: unknown,
  list: unknown[],
  index: number
) => [
  ...list.slice(0, index),
  item,
  ...list.slice(index + 1)
]

export const removeItemByIndex = (list: unknown[], index: number) => [
  ...list.slice(0, index),
  ...list.slice(index + 1)
]

export const findAndReplaceItemInList = (item: unknown, list: unknown[]) => {
  const itemIndex = list.indexOf(item)
  return itemIndex >= 0 ?
  replaceItemInList(
    item,
    list,
    list.indexOf(item)
  ) : list
}

export const findAndRemoveItemInList = (
  item: unknown,
  list: unknown[]
) => {
  const itemIndex = list.indexOf(item)
  return itemIndex >= 0 ? removeItemByIndex(
    list,
    list.indexOf(item)
  ) : list
}