Inline On Tue, Nov 10, 2015 at 12:52 PM, Kevin Smith <[email protected]> wrote: >> - I don't like the requirement to use the keyword `this` to compose >> functions. JS already has many features to support the keyword `this`: >> prototypes, method invocations, function binding, arrow functions, and >> probably others. I prefer a feature that assists the other side of the >> spectrum. > > > Yep - a well documented critique. It depends on your point of view, I > think. If you view these things as "extension methods", then using `this` > makes more sense. > >> - The fact that there are new semantics to what looks like a normal >> function call (e.g. `->map(...)`) doesn't set well with me. You could argue >> that it's something to get used to. Even in that case, I would expect the >> first argument I give to `map` to stay the first argument. > > > This is a reasonable objection, I think.
Not to mention it's still a point of contention: https://github.com/zenparsing/es-function-bind/issues/26#issuecomment-154130932 (from here, down) > >> With the pipeline operator, partial application is left to the developer. >> They can choose to use arrow functions, or to curry their functions. I think >> this is the best option since it keeps things simple (no new semantics), and >> remains readable – see the "Function with Multiple Arguments" section in the >> GitHub link https://github.com/mindeavor/ES7-pipeline-operator > > > I agree that your proposal wins points for simplicity (both semantic and > syntactic), but having to create an arrow function to pass more than one > argument feels a bit awkward and seems to defeat some of the readability > benefit. Not to mention it would be pretty slow. That's going to be creating a closure each call. Engines still struggle with making closures fast. It's non-trivial at runtime to create a closure that's performant. > > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Isiah Meadows _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
