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add notes to cartesian migration #1806

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Aug 9, 2017
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add notes to cartesian migration #1806

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2 changes: 1 addition & 1 deletion CHANGES.md
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Expand Up @@ -23,7 +23,7 @@ as many breaking changes as possible in this release before we lock down the API
enabled syntax ops are also removed. Please use the partial unification SI-2712 fix
instead. The easiest way might be this [sbt-plugin](https://github.com/fiadliel/sbt-partial-unification).
* `FunctorFilter`, `MonadCombine`, `MonadFilter`, `MonadReader`, `MonadState`, `MonadTrans`, `MonadWriter` and `TraverseFilter` are no longer in `cats`, the functionalities they provided are inhereted by the new [cats-mtl](https://github.com/edmundnoble/cats-mtl) project. Please check [here](https://github.com/edmundnoble/cats-mtl#migration-guide) for migration guide.
* `CartesianBuilder` (i.e. `|@|`) syntax is deprecated, use the apply syntax on tuples instead. E.g. `(x |@| y |@| z).map(...)` should be replaced by `(x, y, z).mapN(...)`
* `CartesianBuilder` (i.e. `|@|`) syntax is deprecated, use the apply syntax on tuples instead. E.g. `(x |@| y |@| z).map(...)` should be replaced by `(x, y, z).mapN(...)`. If you are getting "`mapN` not found" error message, it could be due to SI-2712, see the 3rd migration item above.
* Apply syntax on tuple (e.g. `(x, y, z).map3(...)`) was moved from `cats.syntax.tuple._` to `cats.syntax.apply._` and renamed to `mapN`, `contramapN` and `imapN` respectively.
* The creation methods (`left`, `right`, `apply`, `pure`, etc.) in `EitherT` were improved to take less
type arguments.
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