> return AFS.stat(path)
> .fail(error => null) // map failure to success condition
> .then(stat =>
>
> if (!stat) // Path doesn't exist - create the directory
> return AFS.mkdir(path);
> else if (stat.isDirectory()) // done already
> return 'nothing to do';
> else // no can do
>
> throw new Error("Path is not a directory.");
>
> ).then(val => console.log("done"));
>
>
Provided that fail provides the implicit success handler `val => val`, I
think that's correct. Question: is one-arg `then` + `fail` equally as
powerful as two-arg then? Proof?
- Kevin
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