Opa (programming language): Difference between revisions

Revision as of 17:08, 25 April 2015

Revision as of 19:12, 18 July 2015

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The traditional [[Hello world program]], producing a web server that serves a static page with "Hello, web!" as its content, can be written in Opa as:<ref>{{cite web |url=http://www.morganhill.co.uk/cloud/opa-the-cloud-language-test-drive/|title=Opa, the cloud language – a test drive |date=26 July 2011 |publisher=Morgan Hill |author=Alastair Aitken}}</ref>

<source lang="html5opa">

Server.start(Server.http,

{ title: "Hello"

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It can be compiled to a stand-alone executable JS file with:

<source lang="bash">

$ opa hello_web.opa

</source>

Running the resulting executable JS file launches the web application:

<source lang="bash">

$ ./hello_web.js

</source>