11 lines
219 B
CoffeeScript
11 lines
219 B
CoffeeScript
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flatten = (arr) ->
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arr.reduce ((xs, el) ->
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if Array.isArray el
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xs.concat flatten el
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else
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xs.concat [el]), []
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# test
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list = [[1], 2, [[3,4], 5], [[[]]], [[[6]]], 7, 8, []]
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console.log flatten list
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