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Chris Tate
26676e9df2
In a fused helper chain, take(n) sets the chain's done flag as it delivers its nth value, so nothing is pulled after it. A flatMap later in the chain tested the same flag in its inner walk and stopped after the first flattened value: gen().take(2).flatMap((x) => [x, x + 10]) gave [0, 10] where Node gives [0, 10, 1, 11]. A flatMap stage after a take now holds the flag while it walks its inner iterable, and sets it again afterwards. A terminal that short-circuits or a take later in the chain still stops the inner walk.