Libraries · medium

24. Libraries & using for

Attach helpers to a type.

Library `ArrLib` with `contains(uint256[] storage arr, uint256 v) internal view returns (bool)`. In `MyList`, `using ArrLib for uint256[]` and expose `has(uint256)`.

Required in your answer: library ArrLibusing ArrLib for uint256[]nums.contains

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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// TODO library ArrLib
// TODO contract MyList

Output appears here.

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