kenji yoshida

# Pull Request Checklist * [x] Have you read [How to write the perfect pull request](https://github.com/blog/1943-how-to-write-the-perfect-pull-request)? * [x] Have you read through the [contributor guidelines](https://www.playframework.com/contributing)? * [x] Have you signed...

throw error if RoutesCompiler generate duplicate routes files

2

# Pull Request Checklist * [x] Have you read [How to write the perfect pull request](https://github.com/blog/1943-how-to-write-the-perfect-pull-request)? * [x] Have you read through the [contributor guidelines](https://www.playframework.com/contributing)? * [x] Have you signed...

ExplicitResultTypes generate invalid code when use type lambda

2

## step #### project/build.properties ```properties sbt.version=1.3.10 ``` #### project/scalafix.sbt ```scala addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.15") ``` #### build.sbt ```scala scalaVersion := "2.12.11" ``` #### Main.scala ```scala trait Functor[F[_]] object Main...

travis-ci no longer support oraclejdk7 https://github.com/travis-ci/travis-ci/issues/7884#issuecomment-308451879

ListT violate the associative law

13

due to https://github.com/scalaz/scalaz/pull/166 - https://wiki.haskell.org/ListT_done_right - https://wiki.haskell.org/ListT_done_right_alternative > 3.4 Order of ListT [] > This is a simple example that doesn't use IO, only pure ListT []. > v ::...

use by-name implicits https://github.com/scalaz/scalaz/commit/12b69fe56867cd81a19ffd6bbfac5cd6857056f6

consider another implementation of FreeAp

5

- https://github.com/ethul/purescript-freeap/pull/9 - https://github.com/ethul/purescript-freeap/pull/10 - http://www.fceia.unr.edu.ar/~mauro/pubs/Notions_of_Computation_as_Monoids.pdf