Transform and compare clear solution for Correct Capital by veky - python coding challenges

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Transform and compare solution in Clear category for Correct Capital by veky

correct_capital = lambda s: s in {s.upper(), s.lower(), s.capitalize()}

Sept. 13, 2022

Comments:

dx2-66 on Nov. 7, 2022, 7:30 a.m.
I should finally memorize that .capitalize() exists...

veky on Nov. 8, 2022, 12:03 a.m.
Yeah. As well as <pre class='brush: python'>>>> len(set(dir(str)) - {'capitalize'}) 80 </pre> other str methods. :-D (While we're at it, have you heard about .swapcase?;))

dan_rue on Dec. 4, 2022, 3:43 p.m.
OK, it looks really nice. But just wondering.. How is this better than <pre class='brush: python'>correct_capital = lambda line: line.isupper() or line.islower() or line.istitle() </pre> since your solution has to call all three functions every time?

veky on Dec. 5, 2022, 3:59 a.m.
Well, they are subtly different. They give different results for lines such as `''` or `123`, or even the lines containing noncased letters. The real reason is that I forgot that .istitle exists, since I never used it. Yeah, it happens to the best of us. :-D But if you're really hung up on editing my solution into calling only until you get something true, you can say <pre class='brush: python'>line in (f() for f in (line.upper, line.lower, line.title)) </pre> or even <pre class='brush: python'>line in (getattr(f, m)() for m in 'upper lower title'.split()) </pre> though there getattr will surely eat all your performance gain. :-] Of course, you can also use `any`. And/or you can convert inner `tuple` into a `set` for a quasirandomization of the order of methods tried. :-D

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