I learned about Opal for Ruby recently and would like to convert a Ruby file to Javascript. I've used Coffeescript before, and I can compile a Coffeescript file to Javascript with a certain command on Node.js. How do I do the same with Ruby and Opal to Javascript ?
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To compile your Ruby to JavaScript:
-cmeans "compile to JavaScript" (as opposed to "execute now"); the JavaScript is written to the standard output, so you can use redirection to capture it to a file.