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想,我有一個IEnumerable<Tuple<string, object>>
,並且我想更換爲枚舉的每個元素的(幾個)其他元素的列表中的第一個元素:需要用的SelectMany一點幫助
Original enumerable: { { "a", obj1 }, { "b", obj2 } }
First-element replacement: a -> { "c", "d" }, b -> { "e", "f", "g" }
Result : { { "c", obj1 }, { "d", obj1 }, { "e", obj2 }, { "f" , obj2 }, { "g" , obj2 } }
我怎樣才能比
enumerable.SelectMany(item => ReplacementFunction(item.Item1).Select(newItem =>
new Tuple<string, object>(newItem, item.Item2)))
定義「更好」? –