https://github.com/pfgray/babel-plugin-monadic-do

Monads, Do style
https://github.com/pfgray/babel-plugin-monadic-do

Last synced: 2 months ago
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Monads, Do style

• Host: GitHub
• URL: https://github.com/pfgray/babel-plugin-monadic-do
• Owner: pfgray
• Created: 2018-10-23T19:19:30.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-10-25T13:54:10.000Z (over 6 years ago)
• Last Synced: 2025-03-18T09:37:47.632Z (2 months ago)
• Language: JavaScript
• Size: 4.88 KB
• Stars: 38
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md

Awesome Lists containing this project

README

        

Hijacks `do` expressions with bitwise left shift (`<<`) to implement the `for`/`yield` syntax we all know and :heart: from [scala](https://docs.scala-lang.org/tutorials/FAQ/yield.html).

If you don't like using the tasiest syntax sugar available, then stay away!

However, if you like feeling alive and the taste of the kool-aid they're handing out in fp land, then look no further!

You can turn:

```js

getFoo("/api/foo").chain(foo => {

  return getBar("/api/bar").chain(bar => {

    const lol = bar.name;

    return getBaz("/api/baz/" + lol).map(baz => {

      return foo + bar + baz;

    });

  });

});

```

into:

```awesome-sauce

do {

  foo << getFoo("/api/foo")

  bar << getBar("/api/bar")

  const lol = bar.name;

  baz << getBaz("/api/baz/" + lol)

  foo + bar + baz;

}

```

Limitations:

  1. Top expression _must_ be a 'bind' expression, i.e. `x << y`

  2. Last line must be a plain expression (not a bind expression)

  3. Coworkers will loathe you when you try to explain monads to them.