 JS
        JS  
      JavaScriptラムダ式完全解説!7つの使い方と注意点を一挙公開    
   JS
        JS   VHDL
        VHDL   Ruby
        Ruby   Kotlin
        Kotlin   PHP
        PHP   JS
        JS   TypeScript
        TypeScript   Python
        Python   CSS
        CSS   COBOL
        COBOL   PHP
        PHP   Ruby
        Ruby   Dart
            Dart     Ruby
            Ruby     Python
            Python     Ruby
            Ruby     TypeScript
            TypeScript     Swift
            Swift     HTML
            HTML     Swift
            Swift     PHP
            PHP     HTML
            HTML