Replace Temp with Query

Goal

A local variable assigned once from a computation becomes a function that returns that computation on demand.

Before the refactoring

function bill() {
  const basePrice = qty * itemPrice;
  if (basePrice > 1000) return basePrice * 0.95;
  return basePrice;
}

After the refactoring

function bill() {
  if (basePrice() > 1000) return basePrice() * 0.95;
  return basePrice();
}
function basePrice() { return qty * itemPrice; }

Savings

Extract Function becomes easier (the query has a name and stable scope); the temp's lifetime no longer constrains how the surrounding function is split.

Note

If the temp wraps an expensive calculation called many times, naive replacement may multiply cost — measure or cache before deciding.