 TypeScript
        TypeScript  
      TypeScriptでオプション引数を使う方法10選    
   TypeScript
        TypeScript   Ruby
        Ruby   Groovy
        Groovy   Ruby
        Ruby   C++
        C++   Verilog
        Verilog   HTML
        HTML   JS
        JS   HTML
        HTML   C++
        C++   C++
        C++   TypeScript
        TypeScript   COBOL
            COBOL     JS
            JS     C++
            C++     Swift
            Swift     Dart
            Dart     Kotlin
            Kotlin     C#
            C#     Java
            Java     C++
            C++     Swift
            Swift