ภาษา haskelllanguage กลับมา nth ของรายการ

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ภาษา haskelllanguage รายการอีลีเมนต์อยู่ที่ดัชนี

-- the "!!" operator return the n-th element from the list
-- *this is zero based

"string" !! 2 --> "r"

[10, 20, 30, 40] !! 1 --> 20

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