Array comprehension syntax

Allen Wirfs-Brock allen at
Sat Sep 22 10:51:19 PDT 2012

On Sep 22, 2012, at 10:39 AM, Brendan Eich wrote:

> Jason Orendorff wrote:
>> ...
> Yeah, not as strong a precedent -- we should treat JS as big brother here, over time.
>> I actually kind of like Allen's argument about not wanting to
>> encourage the use of array comprehensions for complicated use cases.
>> However I'm not sure how that squares with a distaste for nanny syntax
>> restrictions!
> Yup. I thought perhaps Allen left out a "not" or otherwise inverted his meaning, though.

I don't think so:

> My personal bias, is that comprehensions are just sugar that are best used to express relatively simple and common construction use cases.  Complicated sequences of |for| and |if| clauses will be rarely seen and hence less understandable than the equivalent explicit looping expansions. 

My personal preference would be:

1) don't have comprehensions at all (but that's not harmonious, so I'm not actually suggesting it)
2) a)  one or more fir clauses followed by a single optional if clause (what is currently in the draft)


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