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BadgeFest:\n\n[![apple][apple-badge-image]][apple-url]\n[![atom][atom-badge-image]][atom-url]\n[![circleci][circleci-badge-image]][circleci-url]\n[![codeclimate][codeclimate-badge-image]][codeclimate-url]\n[![git][git-badge-image]][git-url]\n[![github][github-badge-image]][github-url]\n[![npm][npm-badge-image]][npm-url]\n[![packagephobia][packagephobia-badge-image]][packagephobia-url]\n[![terminal][terminal-badge-image]][terminal-url]\n[![typescript][typescript-badge-image]][typescript-url]\n\n[![status][status-badge-image]][status-url]\n[![build status][build-status-badge-image]][build-status-url]\n[![npm version][npm-version-badge-image]][npm-version-url]\n[![latest tag][latest-tag-badge-image]][latest-tag-url]\n[![npm total downloads][npm-total-downloads-badge-image]][npm-total-downloads-url]\n[![watchers][watchers-badge-image]][watchers-url]\n[![stars][stars-badge-image]][stars-url]\n[![issues][issues-badge-image]][issues-url]\n[![forks][forks-badge-image]][forks-url]\n[![contributors][contributors-badge-image]][contributors-url]\n[![branches][branches-badge-image]][branches-url]\n[![releases][releases-badge-image]][releases-url]\n[![commits][commits-badge-image]][commits-url]\n[![last commit][last-commit-badge-image]][last-commit-url]\n[![types][types-badge-image]][types-url]\n[![install size][install-size-badge-image]][install-size-url]\n[![known vulnerabilities][known-vulnerabilities-badge-image]][known-vulnerabilities-url]\n[![lines of code][lines-of-code-badge-image]][lines-of-code-url]\n[![technical debt][technical-debt-badge-image]][technical-debt-url]\n[![maintainability][maintainability-badge-image]][maintainability-url]\n[![test coverage][test-coverage-badge-image]][test-coverage-url]\n[![tested with jest][jest-badge-image]][jest-url]\n[![code style: prettier][prettier-badge-image]][prettier-url]\n[![license][license-badge-image]][license-url]\n\nMuch of the code in this library was based on or inspired by the book 'Programming Languages: An Interpreter-Based Approach', by Samuel N. Kamin, 1990, Addison Wesley, ISBN 0-201-06824-9.\n\n## Building and Installing the App\n\nBuild and install the app via:\n\n```console\n$ npm run all\n$ npm link\n```\n\n## Launching the App\n\nStart an interpreter via the command:\n\n```console\n$ intrp [language-name]\n```\n\n... where [language-name] is one of:\n\n- minimal\n- chapter1\n- lisp\n- apl\n- scheme\n- sasl\n- clu\n- smalltalk\n- prolog\n\n## Session Example\n\n```console\n$ intrp scheme\n\nThis is the command line interface for thaw-interpreter\n\nStarting the read-evaluate-print loop:\n\n\u003e (+ 2 3)\n5\n\n\u003e exit\nExiting...\n\n$\n```\n\n## The Script Runner\n\nThe interpreter provides a limited facility for running scripts. Currently, it is capable of reducing Lambda calculus expressions.\n\nExample: Addition of two Church numerals using pure Lambda calculus:\n\n```console\n$ ./run-script.js lcaug examples/scripts/lambda-calculus-augmented-syntax/test1.lca \n\nExpression as string: (+ 2 3) \n\nParsed expression: λf.λx.((λf.λx.(f (f (f x))) f) ((λf.λx.(f (f x)) f) x))\n\nReduced expression: Integer 5\n```\n\n## License\n[MIT](https://choosealicense.com/licenses/mit/)\n\n[apple-badge-image]: https://badgen.net/badge/icon/apple?icon=apple\u0026label\n[apple-url]: https://www.apple.com\n[atom-badge-image]: https://badgen.net/badge/icon/atom?icon=atom\u0026label\n[atom-url]: https://atom.io\n[circleci-badge-image]: https://badgen.net/badge/icon/circleci?icon=circleci\u0026label\n[circleci-url]: https://circleci.com\n[codeclimate-badge-image]: https://badgen.net/badge/icon/codeclimate?icon=codeclimate\u0026label\n[codeclimate-url]: https://codeclimate.com\n[git-badge-image]: 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