I think the intention is to suppress single-element arrays?
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This code is like a René Magritte painting. It's perfectly clear what the code literally does, but it's an absolute mystery why it does that or what it's actually intended to accomplish... plus, the title (`reduce`) is a perfect non-sequiturhttps://twitter.com/mountain_ghosts/status/1119928600730525697 …
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hang on, wont this crash if the array is empty??
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No, it'll just return `undefined`. Impossible to say whether this is the intended behaviour though
End of conversation
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This looks like like the APL “disclose” operation which removes one layer of wrapping. If the argument is not actually wrapped, it is a no-op.
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