Write Reducers for Different Data Types
Now that we understand the problem transducers can help us with, it's time to define what they actually are. A Transducer is a combination of two concepts, a transform, and a reducer. Trans-Ducer. In this lesson we'll give a general overview of the reducer part of the puzzle.
an aside: Those inline /?/ logging things are cool. Is that a webstorm thing? Hmm wonder if I could implement that in sublime text?
What are you doing to automatically get the logging annotation in quokka? As in /*?*/
@timothy it's a plugin called quokka, but also has editor support for vs code and atom. It's pretty awesome for explorative coding and getting super fast feedback loops https://quokkajs.com/
@paul I've just got a webstorm live template for it with the string qc which expands on tab press
write qc, press tab -> /*?*/
If it appears more automatic than that it's probably due to the magic of editing :).
However, I've also recorded a macro which goes to end of line, writes qc and presses tab which works really well, but didn't use that in the videos.
Hi Paul, with quokka i have the error bellow Quokka 'Untitled-3.js' (node: v9.3.0, babel: v6.26.3, plugins: jsdom-quokka-plugin) SyntaxError: quokka.js: Unexpected token (60:8) 58 | const objReducer = (acc, obj) => { 59 | return {
60 | ...acc, | ^ 61 | ...obj, 62 | } 63 | } any idea?
Hi @Yvon, It's a bit hard to see the code snippet above, but my guess is that's due to babel not knowing how to handle the spread operator. Since you're using babel 6, you prob have to add this plugin: https://www.npmjs.com/package/babel-plugin-transform-object-rest-spread. You could also try using babel@7 instead, which supports this syntax by default I believe (with something like https://babeljs.io/docs/en/babel-preset-env )
Hi Paul, thanks a lot for the answer. I had to use babel@7. Great course by the way.
Is that WallabyJS in your IDE?! :)