Lessons in Scala `Cats`

Examples

Make a backup of ~/.dotty_history, then copy the .dotty_history from some lesson, and launch the REPL:

scala-cli repl -S 3.7.2-RC1 --dep org.typelevel::cats-effect:3.6.2                        \
                            --dep org.typelevel::cats-core:2.13.0                         \
                            --dep org.typelevel::cats-free:2.13.0                         \
                            --dep org.typelevel::algebra:2.13.0                           \
                            -
5740
-dep org.scala-lang.modules::scala-parser-combinators:2.4.0

Execute each line from the beginning, in this order.

Projects

Each project is named kittens built with SBT developed in Scala 3.

Name		Name	Last commit message	Last commit date
Latest commit History 49 Commits
covariant-1-contravariant		covariant-1-contravariant
covariant-2-contravariant		covariant-2-contravariant
eval-1-function0		eval-1-function0
eval-2-expr-tree		eval-2-expr-tree
expr-01-trait		expr-01-trait
expr-02-eval		expr-02-eval
expr-03-swap		expr-03-swap
expr-04-parser		expr-04-parser
expr-05-parser		e 10000 xpr-05-parser
expr-06-builder		expr-06-builder
expr-07-builder		expr-07-builder
expr-08-monoidK		expr-08-monoidK
expr-09-ring		expr-09-ring
expr-CoflatMap		expr-CoflatMap
expr-eert		expr-eert
expr-paired		expr-paired
expr-simplify		expr-simplify
expr-tree		expr-tree
kleisli-1-list		kleisli-1-list
kleisli-2-trampoline		kleisli-2-trampoline
monoid-1-option		monoid-1-option
monoid-2-list		monoid-2-list
monoid-3-string		monoid-3-string
monoid-4-resolve		monoid-4-resolve
mt-1-compose		mt-1-compose
mt-2-EitherT		mt-2-EitherT
mt-3-OptionT		mt-3-OptionT
mt-4-IorT		mt-4-IorT
mt-5-ReaderT		mt-5-ReaderT
mt-6-WriterT		mt-6-WriterT
mt-7-StateT		mt-7-StateT
mt-8-ExprT		mt-8-ExprT
mt-9-WriterT-Validated		mt-9-WriterT-Validated
nat-1-trampoline		nat-1-trampoline
nat-2-trampoline		nat-2-trampoline
nat-3-trampoline		nat-3-trampoline
nat-4-list		nat-4-list
queens-1-native		queens-1-native
queens-2-heap		queens-2-heap
queens-3-trampoline		queens-3-trampoline
queens-4-interpreter		queens-4-interpreter
recursion-1-lambda-calculus		recursion-1-lambda-calculus
recursion-2-schemes		recursion-2-schemes
recursion-3-Cofree		recursion-3-Cofree
recursion-4-Defer		recursion-4-Defer
traverse-1-list		traverse-1-list
traverse-2-chain		traverse-2-chain
traverse-3-lazylist		traverse-3-lazylist
traverse-4-nel		traverse-4-nel
traverse-5-set-expr		traverse-5-set-expr
traverse-6-list		traverse-6-list
traverse-7-poke		traverse-7-poke
README.md		README.md

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