Moreover `undefined|0` is exactly 0. The `|0` is used in asm.js because it explicitly declares the intent.
So again, no error in there ;-) Regards On Tue, Apr 28, 2015 at 1:58 PM, Andrea Giammarchi < [email protected]> wrote: > Now you read again the "exercise" and realize that's impossible to have as > a piutfall ... no, I just used a KISS approach for what I can tell, no > pitfalls with one single surrogate could happen by specs. > > Best Regards > > On Tue, Apr 28, 2015 at 1:57 PM, Axel Rauschmayer <[email protected]> > wrote: > >> With Maps, there are less pitfalls. For example: what if you want to use >> your version to count words and one of the words is `__proto__`? Most >> pitfalls can be fixed via `Object.create(null)`, but Maps are more >> straightforward for data (vs. code). >> >> But your version can be easily adapted to Maps, I like the way you use >> `reduce()`. The `|` should be a `||`. >> >> On 28 Apr 2015, at 14:31 , Andrea Giammarchi <[email protected]> >> wrote: >> >> Not sure why everyone went for the `Map` version when in JS every object >> is basically the equivalent of a `Map` already :-) >> >> ```js >> let m = Array.from("mainn").reduce((m,k) => ((m[k] = 1 + (m[k] | 0)), m), >> {}); >> ``` >> >> looks a win to me, if you need to check or drop chars from the string I >> would probably do it once before passing that to `Array.from` >> >> Agreed with Kevin this is rather a StackOverflow like question :-) >> >> Best Regards >> >> >> On Tue, Apr 28, 2015 at 1:19 PM, Kevin Smith <[email protected]> >> wrote: >> >>> Another option: >>> >>> var map = new Map; >>> Array.from("mainn") >>> .map(c => c.toLowerCase()) >>> .forEach(c => map.set(c, (map.get(c) | 0) + 1)); >>> >>> This kind of question is probably better left for StackOverflow, however. >>> >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >>> >> >> -- >> Dr. Axel Rauschmayer >> [email protected] >> rauschma.de >> >> >> >> >
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