I went experimenting in a slightly different direction, there's usually a lot of concatenation going on in Javascript with e.g. array manipulation, so I decided

I went experimenting in a slightly different direction, there's usually a lot of concatenation going on in Javascript with e.g. array manipulation, so I decided to try to delay the `.then()` as much as possible. So instead of these: const value = await Promise.all(data.map(op1)) .then(value => value.filter(op2)) .then(value => Promise.all(value.map(op3))); // OR (a more readable version) let value = await Promise.all(data.map(op1)); value = value.filter(op2); value = await Promise.all(value.map(op3)); Now you can do this: const value = await swear(data).map(op1).filter(op2).map(op3); I integrated it with my other library `files`, where it's very useful out of the box: const list = await read('data.csv').split('\n').map(...); const readmes = await walk('readme.md').map(read); https://www.npmjs.com/package/swear https://www.npmjs.com/package/swear https://www.npmjs.com/package/files https://www.npmjs.com/package/files