+1000 Classic feature creep with basically zero application.
On Thursday, 3 November 2016, Isiah Meadows <[email protected]> wrote: > Could we just *not* have a `String.range`? > > 1. Needing a list of alphabetically sorted characters is a bit niche, even > in the Latin alphabet. > 2. It's ambiguous whether it should include symbols or not. (think: > `String.range("A", "z")`) > 3. If it's Unicode-aware, how should it act with, say, `String.range("A", > "π")`? > > On Thu, Nov 3, 2016, 16:21 Viktor Kronvall <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> Even more interestingly what would `String.range("","zzz")` produce. From >> what code point is the range started? Will this throw? Is the empty string >> included in the iterator? >> 2016年11月3日(木) 21:18 Viktor Kronvall <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>>: >> >>> Actually, after giving it some more thought for that case there is just >>> that one possibility that makes sense. >>> >>> However, there are more ambiguous cases such as `String.range("AAA", >>> "ZZZ")` (should all letters increase at once or should the rightmost letter >>> be incremented first) >>> >>> Also, how would range handle the arguments in inverted order? Should >>> there be a decreasing range or should it terminate with no elements in the >>> iterator? >>> 2016年11月3日(木) 21:05 kdex <[email protected] >>> <javascript:_e(%7B%7D,'cvml','[email protected]');>>: >>> >>>> About the code points: `String.range` should also handle surrogate >>>> pairs, similar to for..of does it. >>>> About `String.range("A", "zzz")`: Do any other possibilities even make >>>> sense? >>>> >>>> On Thursday, November 3, 2016 6:47:04 PM CET Viktor Kronvall wrote: >>>> > For `String.range` what would the expected result of >>>> > `String.range('A','zzz')` be? >>>> > >>>> > Is an exhaustive pattern expected? >>>> > >>>> > `['A','B','C',...'Z','a','b','c',...,'z','AA','AB',...]` >>>> > 2016年11月3日(木) 19:21 Michael J. Ryan <[email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>>: >>>> > >>>> > > If there's a Number.range, if suggest a corresponding String.range >>>> for >>>> > > character ranges... Agreed on it being a utility function over me >>>> syntax. >>>> > > >>>> > > On Nov 3, 2016 10:25 AM, "Isiah Meadows" <[email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >>>> > > >>>> > > If string ranges are based on character codes, it will (for the >>>> Latin >>>> > > alphabet, at least, not necessarily for other languages). >>>> > > >>>> > > I would prefer a function over syntax, though, since it would be >>>> more >>>> > > easily adopted (polyfill > syntax), and it would fit more >>>> idiomatically >>>> > > with the rest of the language (which also uses functions for most >>>> > > utilities). >>>> > > >>>> > > Maybe a `Number.range` would work? >>>> > > >>>> > > ```js >>>> > > Number.range = function *range(start, end=undefined, step=1) { >>>> > > if (end === undefined) [start, end] = [0, start]; >>>> > > if (end === undefined) end = Infinity; >>>> > > for (let i = 0; i < end; i += step) { >>>> > > yield i; >>>> > > } >>>> > > }; >>>> > > ``` >>>> > > >>>> > > On Thu, Nov 3, 2016, 12:56 kdex <[email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >>>> > > >>>> > > Agreed. There's no reason why `Array.range` or `[1..10]` couldn't >>>> just >>>> > > return a generator >>>> > > or at least something that extends a generator, though. I wonder if >>>> it's >>>> > > viable to implement >>>> > > something akin to `.length` on ranges, which could be natural >>>> numbers or >>>> > > `Infinity`. >>>> > > >>>> > > As for numbers, I don't see any issues. One issue that came up in >>>> the >>>> > > original thread was >>>> > > that string ranges may need a better definition, as ["A".."C"] >>>> might not >>>> > > necessarily transpile >>>> > > to be a generator that yields "A", "B" and "C". >>>> > > >>>> > > On Thursday, November 3, 2016 4:46:03 PM CET Isiah Meadows wrote: >>>> > > > I'll note, just for clarity, that Scala's `1 to 10` is >>>> technically just a >>>> > > > normal method call equivalent to `(1).to(10)`, with optional >>>> parentheses >>>> > > > removed. >>>> > > > >>>> > > > Also, I'd prefer this to be a generator instead, so infinite >>>> ranges are >>>> > > > also possible, and so it doesn't have to be eager. >>>> > > > >>>> > > > On Thu, Nov 3, 2016, 11:52 Hikaru Nakashima < >>>> [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> >>>> > > > wrote: >>>> > > > >>>> > > > > How about this >>>> > > > > >>>> > > > > ``` >>>> > > > > for ( i of Array.range(1, 10) ) { ... } >>>> > > > > // OR >>>> > > > > for ( i of [1..10] ) { ... } >>>> > > > > ``` >>>> > > > > >>>> > > > > >>>> > > > > _______________________________________________ >>>> > > > > es-discuss mailing list >>>> > > > > [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> > > > > https://mail.mozilla.org/listinfo/es-discuss >>>> > > > > >>>> > > > >>>> > > _______________________________________________ >>>> > > es-discuss mailing list >>>> > > [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> > > https://mail.mozilla.org/listinfo/es-discuss >>>> > > >>>> > > >>>> > > _______________________________________________ >>>> > > es-discuss mailing list >>>> > > [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> > > https://mail.mozilla.org/listinfo/es-discuss >>>> > > >>>> > > _______________________________________________ >>>> > > es-discuss mailing list >>>> > > [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> > > https://mail.mozilla.org/listinfo/es-discuss >>>> > > >>>> >>>> _______________________________________________ >>>> es-discuss mailing list >>>> [email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> https://mail.mozilla.org/listinfo/es-discuss >>>> >>> _______________________________________________ >> es-discuss mailing list >> [email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');> >> https://mail.mozilla.org/listinfo/es-discuss >> >
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