🔗 Pattern matching: matching, not assigning

You come to Elixir with an assignment model in your head. You see = and your hands move faster than your brain. Then a match fails, or a function head doesn’t run, and you think you made a mistake.

Pattern matching is not about storing a value. It’s about selecting a shape. When the shape doesn’t fit, the match fails, and that failure is useful. It’s how Elixir chooses which path to take.

The mental model is simple: = is a match operator. Pattern matching selects structure and binds names. The pin operator turns a binding into a test.