Interactive interpreter

SeriousJS (ctrl+enter or cmd+enter to run)	Javascript
# Welcome to SeriousJS' interactive interpreter ### Block comments like this ### console.log("You can print results") console.log "Simple methods don't need parenthesis" console.log( "You also don't need closing parens; indentation is what matters. " + "Note that you need a DOUBLE indent for a line continuation; a " + "single indent is used for function bodies or conditional clauses, " + "for instance." fib = (n) -> a = 1 b = 1 while n > 0 t = b b = a a = a + t n -= 1 return a console.log fib(4) console.log fib(5) console.log fib(6) # Or you can do complicated async stuff progressDemo = async -> console.log 1 await 500 console.log 2 await 500 console.log 3 await 500 console.log 4 await 500 console.log 5 await 500 console.log "Done!" jqueryGetter = (url, callback) -> console.log("Getting #{ url } with callback #{ callback }") $.ajax( url crossDomain: true success: (data) -> console.log(data.substring(0, 100)) callback(null, data) error: (jqXhr, textStatus, errorThrown) -> callback("jqueryGetter error: #{ textStatus } / #{ errorThrown }") # Extern means callable without async / await keywords method = async extern () -> async progressDemo for a in ['http://www.google.com', 'http://www.yahoo.com', 'http://www.bing.com'] async extern jqueryGetter a catch e console.log "Error getting #{ a }: #{ e }" method (error, result) -> console.log error console.log result
	Run

Remember that SeriousJS is designed for module compilation, so you'll see some oddities if you're used to CoffeeScript output. For instance, if at the global scope you write "a = 8", then in order to work with NodeJS as well as RequireJS, SeriousJS will put "this.a=a = 8" for you, as it needs to expose the variable at the module level as well as locally.