Re: [racket-users] [ANN] New packages: compose-app and retry

[Deren Dohoda]

Thanks a lot! Retryers are fantastic. I have poorly written this code more
than a few times and I like the model a lot.

Deren

On Tue, Jan 10, 2017 at 10:31 PM, Jack Firth  wrote:

> I've added two new packages to the package catalog. The first,
> `compose-app`, provides a
> simple #%app macro for composing single-argument functions together:
>
> > (require compose-app)
> > (map (add1 .. string->number) (list "1" "2" "3"))
> (list 2 3 4)
>
> Optionally, you can use the package with `fancy-app` to get both
> composition syntax and underscores-as-lambdas syntax:
>
> > (require compose-app/fancy-app)
> > (map (/ _ 2 .. string->number) (list "10" "20" "30"))
> (list 5 10 15)
>
> The second package, `retry`, provides "retryers" for repeating operations
> in the event of failure. To use, first construct retryers for each action
> you wish to do (e.g. sleep X seconds, log a message, etc.), then combine
> the retryers together with `retryer-compose`, then use `call/retry` or
> `with-retry` to evaluate something until it succeeds.
>
> For more information, see:
>
> - The `compose-app` docs: http://docs.racket-lang.org/
> compose-app/index.html
> - The `retry` docs, including The Retry Guide and The Retry Reference:
> http://docs.racket-lang.org/retry/index.html
> - The `compose-app` Github repo: https://github.com/jackfirth/compose-app
> - The `retry` Github repo: https://github.com/jackfirth/racket-retry
> - The `fancy-app` Github repo: https://github.com/samth/
> fancy-app/tree/master
>
> Patches, issues, comments, musings, and lollipops are all welcome. Special
> thanks to Sam for fancy-app!
>
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[racket-users] [ANN] New packages: compose-app and retry

[Jack Firth]

I've added two new packages to the package catalog. The first, `compose-app`, 
provides a
simple #%app macro for composing single-argument functions together:

> (require compose-app)
> (map (add1 .. string->number) (list "1" "2" "3"))
(list 2 3 4)

Optionally, you can use the package with `fancy-app` to get both composition 
syntax and underscores-as-lambdas syntax:

> (require compose-app/fancy-app)
> (map (/ _ 2 .. string->number) (list "10" "20" "30"))
(list 5 10 15)

The second package, `retry`, provides "retryers" for repeating operations in 
the event of failure. To use, first construct retryers for each action you wish 
to do (e.g. sleep X seconds, log a message, etc.), then combine the retryers 
together with `retryer-compose`, then use `call/retry` or `with-retry` to 
evaluate something until it succeeds.

For more information, see:

- The `compose-app` docs: http://docs.racket-lang.org/compose-app/index.html
- The `retry` docs, including The Retry Guide and The Retry Reference: 
http://docs.racket-lang.org/retry/index.html
- The `compose-app` Github repo: https://github.com/jackfirth/compose-app
- The `retry` Github repo: https://github.com/jackfirth/racket-retry
- The `fancy-app` Github repo: https://github.com/samth/fancy-app/tree/master

Patches, issues, comments, musings, and lollipops are all welcome. Special 
thanks to Sam for fancy-app!

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