leihuazhe/scala_scala3_samples

scala_samples

Scala3 学习专栏

• https://www.zhihu.com/people/maple-3-71/posts
• https://www.jianshu.com/u/dafae09a632e

//scala3格式化 配置方式: https://scalameta.org/scalafmt/docs/configuration.html

metals

metals completions not work in scala3,why?

• https://www.reddit.com/r/scala/comments/s9t702/metals_code_completion_not_working_as_of_jan_2022/

本地调试:

sbt -jvm-debug 5005 run

Marco 调试

sbt -J-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

指定不同的配置文件:

sbt -Dconfig.resource=application-private.conf -jvm-debug 5005 run

使用 build.sbt 来定义依赖关系

name := "scala-sum"

version := "0.1"

scalaVersion := "2.12.4"

libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.38"

// https://mvnrepository.com/artifact/com.alibaba/fastjson
libraryDependencies += "com.alibaba" % "fastjson" % "1.2.7"

libraryDependencies += "com.github.wangzaixiang" %% "scala-sql" % "2.0.6"

libraryDependencies ++= Seq(
  "org.slf4j" % "slf4j-api" % "1.7.9",
  "org.scala-lang" % "scala-reflect" % scalaVersion.value,

  "com.h2database" % "h2" % "1.4.184" % "test",
  "junit" % "junit" % "4.12" % "test",
  "ch.qos.logback" % "logback-classic" % "1.1.3" % "test",
  "mysql" % "mysql-connector-java" % "5.1.38" % "test"
)

Marco

• https://github.com/lampepfl/scala3-macro-tutorial

Scala3 good Question

• https://stackoverflow.com/questions/68194436/parsing-scala-3-code-from-a-string-into-scala-3-ast-at-runtime