21 replies

Simplified Transform Operation with Schema.map and Schema.bimap

I am thinking about it every once in a while. Are we going to ever have a simplified

transform

transform

operation? Sounds like a

Schema.map

Schema.map

Schema.bimap

Schema.bimap

in fp terms.

Schema.struct({ hello: Schema.string })
  .pipe(
    Schema.bimap(
      ({ hello: world }) => ({ world }),
      ({ world: hello }) = ({ hello })
    )
  )

Schema.struct({ hello: Schema.string })
  .pipe(
    Schema.bimap(
      ({ hello: world }) => ({ world }),
      ({ world: hello }) = ({ hello })
    )
  )

This is especially convenient when building input arguments that have dependencies between them (startDate and timezoneOffset for instance)

For example, in Zod it would be:

z.object({ hello: z.string() })
  .transform(({ hello: world }) => ({ world }))

z.object({ hello: z.string() })
  .transform(({ hello: world }) => ({ world }))

I know that Schema works both ways and the Zod definition is not enough. But I think it can make total sense to have a simplified encode/decode function pairs for easy transformations.

Is that planned or possible to implement in userland?

Effect Community•3y ago•

21 replies

schniz

Simplified Transform Operation with Schema.map and Schema.bimap

I am thinking about it every once in a while. Are we going to ever have a simplified

transform

transform

operation? Sounds like a

Schema.map

Schema.map

Schema.bimap

Schema.bimap

in fp terms.

Schema.struct({ hello: Schema.string })
  .pipe(
    Schema.bimap(
      ({ hello: world }) => ({ world }),
      ({ world: hello }) = ({ hello })
    )
  )

Schema.struct({ hello: Schema.string })
  .pipe(
    Schema.bimap(
      ({ hello: world }) => ({ world }),
      ({ world: hello }) = ({ hello })
    )
  )

This is especially convenient when building input arguments that have dependencies between them (startDate and timezoneOffset for instance)

For example, in Zod it would be:

z.object({ hello: z.string() })
  .transform(({ hello: world }) => ({ world }))

z.object({ hello: z.string() })
  .transform(({ hello: world }) => ({ world }))

Simplified Transform Operation with Schema.map and Schema.bimap

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