I agree 100% that this would make a great addition to JS! We've had the pipeline operator in Stratified JS for a while - see https://conductance.io/reference#sjs:%23language/syntax::double-dot - , and in our experience it makes a lot of code much more readable.
We call it '..' (the 'doubledot operator') instead of '|>' - IMO this feels more aligned with existing JS syntax and less jarring than '|>'. On Tue, Nov 10, 2015 at 10:54 AM, Gilbert B Garza <[email protected]> wrote: > Hello, I'm a JavaScript programmer and instructor who loves functional > programming and writing concise, readable code. I think in general > JavaScript supports programming in a functional style quite well. However, > there is one small missing piece that I miss from other FP languages: the > simple-yet-useful pipeline operator. > > Similar to F#, Elixir, Elm, and other FP languages, the pipeline operator |> > helps make multiple function invocations more readable. Basically, > `sqrt(64)` is equivalent to `64 |> sqrt`. For example, given the following > functions: > > ```js > function doubleSay (str) { return str + ", " + str; } > function capitalize (str) { return str[0].toUpperCase() + str.substring(1); > } > function exclaim (str) { return str + '!'; } > ``` > > you could use the pipeline operator to expand your invocations for > readability: > > ```js > // old way: > // var result = exclaim(capitalize(doubleSay("hello"))); > > // new way: > var result = "hello" > |> doubleSay > |> capitalize > |> exclaim; > > // or, if you like one-liners: > var result = "hello" |> doubleSay |> capitalize |> exclaim > > result //=> "Hello, hello!" > ``` > > You can see a few more examples, including an advanced example with > Promises, here: https://github.com/mindeavor/ES7-pipeline-operator > > I'm inclined to think this feature is small and straight-forward to > implement. Other than the operator, there are no new semantics. The syntax > transformation is simple, and all existing code would remain unaffected. > > Although small, this feature increases the expressiveness of JavaScript > significantly by opening more API design possibilities. You can see this in > the link I included above. > > Thanks for reading. Any thoughts or comments? > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Alexander Fritze http://onilabs.com _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
