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src/Chapter1.hs
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| -- DON'T FORGET TO SPECIFY THE TYPE IN HERE | ||
| lastDigit n = error "lastDigit: Not implemented!" | ||
| lastDigit :: Int->Int | ||
| lastDigit n = mod n 10 |
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Your implementation is almost correct 🆗
Unfortunately, it returns negative numbers on negative inputs because of how mod works. Sometimes corner cases can be tricky to spot and fix...
src/Chapter1.hs
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| let last = mod n 10 | ||
| x = div n 10 |
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That is a wonderful solution! 👏🏼 You correctly noticed that it is the div and mod, cool 😎
One hint to make your solution even shorter: you can see that you use both:
mod m 10
div m 10The standard library has the divMod function, that actually combines inside both div and mod. And this is exactly what you use!.
So you could write it this way:
(x, y) = divMod m 10You can see how we could pattern match on the pair 🙂
Co-authored-by: Veronika Romashkina <[email protected]>
Co-authored-by: Veronika Romashkina <[email protected]>
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Thank you so much for the valuable feedback I have made the necessary changes as per your suggestion |
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Solutions for Chapter 1
cc @vrom911 @chshersh