第151篇 Solidity 中的数组（Array）

Posted 2023-03-01 wonderBlock

solidity 中的数组（Array）大小可以是固定的，也可以是动态的；

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

contract Array 
    // Several ways to initialize an array
    uint[] public arr;
    uint[] public arr2 = [1, 2, 3];
    // Fixed sized array, all elements initialize to 0
    uint[10] public myFixedSizeArr;

    function get(uint i) public view returns (uint) 
        return arr[i];
    

    // Solidity can return the entire array.
    // But this function should be avoided for
    // arrays that can grow indefinitely in length.
    function getArr() public view returns (uint[] memory) 
        return arr;
    

    function push(uint i) public 
        // Append to array
        // This will increase the array length by 1.
        arr.push(i);
    

    function pop() public 
        // Remove last element from array
        // This will decrease the array length by 1