skills_scala
skills_scala
1 idea中scala项目补全变量、添加打印语句的小技巧
- 自动补全变量：
new Person.var ，然后按回车键；效果：代码变成： val person: Person = new Person - 添加打印语句：
person.name.prln （也可以是prtln） ，然后按回车键。效果，代码变成： println(person.name)
2 idea中scala语言自动补全变量的同时，也自动补全类型
IDE是IDEA，scala中，在new一个对象时，通过快捷键ctrl + Alt + V自动补全变量，但是我还想自动补全变量的类型，就像图中所示，在Specify type前面自动帮你打勾。
可以按照如下图设置：
3 scala命令行界面:help
:help 查看所有可用命令
scala> :help
All commands can be abbreviated, e.g., :he instead of :help.
:edit <id>|<line> edit history
:help [command] print this summary or command-specific help
:history [num] show the history (optional num is commands to show)
:h? <string> search the history
:imports [name name ...] show import history, identifying sources of names
:implicits [-v] show the implicits in scope
:javap <path|class> disassemble a file or class name
:line <id>|<line> place line(s) at the end of history
:load <path> interpret lines in a file
:paste [-raw] [path] enter paste mode or paste a file
:power enable power user mode
:quit exit the interpreter
:replay [options] reset the repl and replay all previous commands
:require <path> add a jar to the classpath
:reset [options] reset the repl to its initial state, forgetting all session entries
:save <path> save replayable session to a file
:sh <command line> run a shell command (result is implicitly => List[String])
:settings <options> update compiler options, if possible; see reset
:silent disable/enable automatic printing of results
:type [-v] <expr> display the type of an expression without evaluating it
:kind [-v] <expr> display the kind of expression's type
:warnings show the suppressed warnings from the most recent line which had any
