简洁地创建一个 IDictionary<_,obj> [英] Concisely creating an IDictionary<_,obj>
问题描述
是否有一种更短的方法来创建 IDictionary<_,obj>
,可能不需要装箱每个值?这就是我所拥有的.
Is there a shorter way of creating an IDictionary<_,obj>
, possibly without boxing every value? This is what I have.
let values =
[ "a", box 1
"b", box "foo"
"c", box true ]
|> dict
Dictionary<_,obj>.Add
可以在不装箱的情况下调用,但我想不出比我拥有的更短的使用方法.
Dictionary<_,obj>.Add
can be called without boxing, but I couldn't figure out a way to use it that's shorter than what I have.
除了定义装箱运算符之外,我还希望有其他东西.
I'm hoping for something other than defining a boxing operator.
根据 Brian 的建议,这里有一种方法可以做到,但它有其自身的问题.
Based on Brian's suggestion, here's one way to do it, but it has its own problems.
let values =
Seq.zip ["a"; "b"; "c"] ([1; "foo"; true] : obj list) |> dict
推荐答案
这是一个解决方案,遵循 kvb 的建议(可能是迄今为止最简洁、最清晰的):
Here's a solution, following kvb's suggestion (probably the most concise, and clearest, so far):
let inline (=>) a b = a, box b
let values =
[ "a" => 1
"b" => "foo"
"c" => true ]
|> dict
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