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flatten nested lists/tuples
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| squash = lambda l: reduce(lambda x,y: x+y,map(lambda e: squash(e) if isinstance(e,(list,tuple)) else [e], l), []) | |
| squash([1,2,(3,[4,5])]) # => [1,2,3,4,5] | |
| # an real world example ;) | |
| "\n".join(squash([header,body,footer])) | |
| # => <html>\n<body><h1>Hello World!</h1></body>\n</html> | |
| # observe that the sections could be any kind of mess of nested arrays. | |
| # but in the end, all we really care about is that they get strung together |
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