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Closure example
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| function counter() { | |
| let count = 0; | |
| function increment() { | |
| return count += 1; | |
| }; | |
| return increment; | |
| } | |
| const generateId = counter(); | |
| generateId(); // 1 | |
| generateId(); // 2 | |
| generateId(); // 3 |
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