Initialize English course 5. #15
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| ```moonbit no-check | ||
| let q = enqueue(enqueue(empty(), 1), 2) | ||
| let (head, tail) = pop(q) | ||
| assert(head == Some(1)) |
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Use inspect instead
course5/lec5_en.md
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| - To find a specific value in a tree's nodes | ||
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| ```moonbit no-check |
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why are we having no-check here?
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Because the definition of Queue is abstract. Do I need to complete the implementation of Queue and its operations at #167?
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Well, what you can do is
<!-- create a comment area
--- moonbit
// and put the implementation inside
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Please check bef1eed.
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| ### Short-circuit Evaluation of Booleans | ||
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| Here, we supplement the content not mentioned in the second lesson, the short-circuit evaluation of booleans. The logical `OR` and `AND` operations are short-circuited. This means that if the result of the current evaluation can be determined, the calculation will be terminated, and the result will be returned directly. For example, in the first case, we are evaluating `true ||` some value. It's clear that `true || any value` will always be true, so only the left side of the operation needs to be evaluated, and the right side won't be evaluated. Therefore, even if we write an instruction such as `abort` here to halt the program, the program will still run normally because the right side hasn't been computed at all. Similarly, if we evaluate `false &&` some value, knowing that `false && any value` will always be false, we won't evaluate the right side either. This brings us back to the traversal of the tree we discussed earlier. When using logical OR, traversal will immediately terminate once any condition is met. |
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@skylee03 Maybe we should move this part to lec2
Co-authored-by: Zihang Ye <[email protected]>
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