switch from local removeFirst copy to iteration for pairing #452
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we don't need a mutable copy of `array` to alter it, instead we can just drop the first element
we don't need to alter a mutable copy of `array`, instead we can just drop the first element.
We don't need to alter a local copy of `array` to generate each pair, instead use stride(from:to:by). In my simple [tests](https://gist.github.com/TheIronBorn/cc0507b36fddad291aa34674eb52ad8f), this can be up to an order of magnitude faster.
kelvinlauKL
reviewed
Jun 4, 2017
Select Minimum Maximum/Maximum.swift
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| */ | |||
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| func maximum<T: Comparable>(_ array: [T]) -> T? { | |||
| var array = array | |||
| guard !array.isEmpty else { | |||
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Since we're force unwrapping array.first due to this guard statement's guarantee, let's merge the two:
// guards against the empty array and also extracts the first element of the array
guard let maximum = array.first else { return nil }
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Oh yeah that's fine. I'll implement in a minute. |
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Looks great! Cheers |
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