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3 The destructuring algorithm

In this chapter, we look at destructuring from a different angle: as a recursive pattern matching algorithm.

The algorithm will give us a better understanding of default values. That will be useful at the end, where we’ll try to figure out how the following two functions differ:

  1. function move({x=0, y=0} = {})         { ··· }
  2. function move({x, y} = { x: 0, y: 0 }) { ··· }