Actually, at least where I'm from, it wouldn't be a comma, it'd be a bar: ∀ x ∈ X | x > 0.<br><br>Moreover, as has been pointed out, the use of 'where' in math is also not universally loved.<br><br><div class="gmail_quote"><div dir="ltr">On Mon, Jun 13, 2016 at 11:03 Charlie Monroe <<a href="mailto:charlie@charliemonroe.net">charlie@charliemonroe.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">`while`, `until` and `unless` all implicate that the loop should break when the condition (or its negation) is met.<br>
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On the other hand, `where` as it is seems logical to me. Anyone who considers serious coding is likely to have basic knowledge of mathematics, so something such as<br>
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∀x ∈ X, x > 0<br>
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which translates into<br>
<br>
for x in X where x > 0<br>
<br>
in Swift, which is pretty much how you'd read the mathematical statement. Yes, there is a comma, not `where` in the formula but when reading, you say "where" (unless you say "every x greater than zero").<br>
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> On Jun 13, 2016, at 5:26 PM, Erica Sadun <<a href="mailto:erica@ericasadun.com" target="_blank">erica@ericasadun.com</a>> wrote:<br>
><br>
><br>
>> On Jun 13, 2016, at 9:23 AM, let var go via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> wrote:<br>
>><br>
>> I am 100% with Charlie on this. Expressiveness has to do with the *effectiveness* of conveying a thought or a feeling.<br>
>><br>
>> Keep "where". It is expressive. It conveys a specific idea effectively and concisely.<br>
><br>
> For those of you in favor of retaining `where`, how do you feel about adding `while`, `until`, `unless`, etc?<br>
><br>
> -- E<br>
><br>
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</blockquote></div>