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Scheme

Scheme is a classic programming language in the Lisp family. It emphasizes functional programming and domain-specific languages but adapts to other styles.

In LiveCodes, Scheme code runs in the browser using BiwaScheme, a Scheme interpreter written in JavaScript.

Note

Lisp language family supported in LiveCodes includes Common Lisp, Scheme, ClojureScript and Fennel.

Usage​

LiveCodes runs Scheme code in the browser. BiwaScheme implements most of the features of R7RS small, including first-class continuation and tail call optimization.

Example:

show code
import { createPlayground } from 'livecodes';

const options = {
  "config": {
    "activeEditor": "script",
    "markup": {
      "language": "html",
      "content": "<div class=\"container\">\n  <h1>Hello, <span id=\"title\">World</span>!</h1>\n  <img class=\"logo\" alt=\"logo\" src=\"https://livecodes.io/livecodes/assets/templates/scheme.svg\" />\n  <p>You clicked <span id=\"counter\">0</span> times.</p>\n  <button id=\"counter-button\">Click me</button>\n</div>\n"
    },
    "style": {
      "language": "css",
      "content": ".container,\n.container button {\n  text-align: center;\n  font: 1em sans-serif;\n}\n.logo {\n  width: 150px;\n}\n"
    },
    "script": {
      "language": "scheme",
      "content": "(let ((title \"Scheme\"))\n  (set-content! \"#title\" title))\n\n(let ((counter 0))\n(add-handler! \"#counter-button\" \"click\"\n(lambda (ev)\n(set! counter (+ counter 1))\n(set-content! \"#counter\" (number->string counter)))))\n\n; check console\n(let ((time-now (date-hour (current-date))))\n(console-log\n(cond ((< time-now 12) \"Good morning\")\n((< time-now 18) \"Good afternoon\")\n(else \"Good evening\"))))\n"
    }
  }
};
createPlayground('#container', options);

JS Interoperability​

See BiwaScheme docs.

Language Info​

Name​

scheme

Extensions​

.scm

Editor​

script

Compiler​

BiwaScheme, a Scheme interpreter written in JavaScript.

Version​

biwascheme: v0.8.0

Code Formatting​

Using Parinfer.

Limitations​

BiwaScheme implements most of the features of R7RS small, however some features are not supported. See the BiwaScheme documentation for more information.

Starter Template​

https://livecodes.io/?template=scheme

Sponsors