Naming things is hard.

namingThings.js

// Naming things based on what they do means we don't have to change
// the name when we change the implementation details

function applyDiscountToItems(items) {
  return items.map(item => ({
    ...item,
    price: item.price * .75
  }))
}

// vs...

function mapDiscountOverItems(items) {
  const result = []
  let i
  
  for (i = 0; i < items.length; i++) {
    const item = items[i]
    results.push({ ...item, price: item.price * .75 })
  }

  return result
}

// The name no longer accurately represents _how_ the discount is applied,
// thus, it wasn't a good name in the first place. Doesn't matter if I map,
// or forEach, or for loop, it only matters _what_ is accomplished, not _how_.