Scripting Languages I: Node.js, Python, PHP, Ruby - Hyperpolyglot
a side-by-side reference sheet sheet one: version | grammar and execution | variables and expressions | arithmetic and logic | strings | regexes | dates and time | arrays | dictionaries | functions | execution control | exceptions | threads sheet two: streams | asynchronous events | files | file formats | directories | processes and environment | option parsing | libraries and namespaces | objects
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http://blog.av-jyo.com/2011-08/12-things-i-thought-when-starting-python-as-phper.html
http://www.devsite.jankh.net/compppr.html
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