Programming File Extensions

$types = [
            'ABAP'                => 'abap',
            'Windows Bat'         => 'bat',
            'BibTeX'              => 'bibtex',
            'Clojure'             => 'clojure',
            'Coffeescript'        => 'coffeescript',
            'C'                   => 'c',
            'C++'                 => 'cpp',
            'C#'                  => 'csharp',
            'CSS'                 => 'css',
            'Diff'                => 'diff',
            'Dockerfile'          => 'dockerfile',
            'F#'                  => 'fsharp',
            'Git'                 => ['git-commit', 'git-rebase'],
            'Go'                  => 'go',
            'Groovy'              => 'groovy',
            'Handlebars'          => 'handlebars',
            'HTML'                => 'html',
            'Ini'                 => 'ini',
            'Java'                => 'java',
            'JavaScript'          => 'javascript',
            'JavaScript React'    => 'javascriptreact',
            'JSON'                => 'json',
            'JSON with Comments'  => 'jsonc',
            'LaTeX'               => 'latex',
            'Less'                => 'less',
            'Lua'                 => 'lua',
            'Makefile'            => 'makefile',
            'Markdown'            => 'markdown',
            'Objective-C'         => 'objective-c',
            'Objective-C++'       => 'objective-cpp',
            'Perl'                => ['perl', 'perl6'],
            'PHP'                 => 'php',
            'Powershell'          => 'powershell',
            'Pug'                 => 'jade',
            'Python'              => 'python',
            'R'                   => 'r',
            'Razor (cshtml)'      => 'razor',
            'Ruby'                => 'ruby',
            'Rust'                => 'rust',
            'SCSS'                => ['scss', 'sass'],
            'ShaderLab'           => 'shaderlab',
            'Shell Script (Bash)' => 'shellscript',
            'SQL'                 => 'sql',
            'Swift'               => 'swift',
            'TypeScript'          => ['typescript', 'ts'],
            'TypeScript React'    => 'typescriptreact',
            'TeX'                 => 'tex',
            'Visual Basic'        => 'vb',
            'XML'                 => 'xml',
            'XSL'                 => 'xsl',
            'YAML'                => 'yaml',
            'VueJS'               => 'vue',
        ];