type-challengesをやってみた

13. Hello World
    特に問題はない

No.4. Pick NG

TIPS
extends
keyof T
key in K

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No.7. Readonly NG
No.4と同じ。

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No.11. Tuple to Object NG

TIPS
PropertyKey
indexed access Array[number]

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No.14. First of Array NG

TIPS
never型

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No.18 Length of Tuple NG

TIPS
a plain type T doesn't have a length property

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No.43 Exclude NG

TIPS
extends TがUに含まれるかどうか

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No.189 Awaited NG

TIPS
infer わからん

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No.268 If NG

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No.533 Concat NG

TIPS
extends で型をArrayにしてからspreadOperatorへ

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No.898 Includes NG

TIPS
難しすぎる。わからん

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No.3057 Push OK
No. 3060 Unshift OK

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