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// SPDX-License-Identifier: MIT |
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pragma solidity ^0.8.17; |
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|
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contract Array { |
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// Several ways to initialize an array |
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uint[] public arr; |
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uint[] public arr2 = [1, 2, 3]; |
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// Fixed sized array, all elements initialize to 0 |
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uint[10] public myFixedSizeArr; |
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|
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function get(uint i) public view returns (uint) { |
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return arr[i]; |
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} |
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|
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// Solidity can return the entire array. |
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// But this function should be avoided for |
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// arrays that can grow indefinitely in length. |
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function getArr() public view returns (uint[] memory) { |
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return arr; |
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} |
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|
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function push(uint i) public { |
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// Append to array |
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// This will increase the array length by 1. |
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arr.push(i); |
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} |
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|
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function pop() public { |
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// Remove last element from array |
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// This will decrease the array length by 1 |
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arr.pop(); |
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} |
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|
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function getLength() public view returns (uint) { |
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return arr.length; |
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} |
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|
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function remove(uint index) public { |
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// Delete does not change the array length. |
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// It resets the value at index to it's default value, |
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// in this case 0 |
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delete arr[index]; |
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} |
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|
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function examples() external { |
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// create array in memory, only fixed size can be created |
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uint[] memory a = new uint[](5); |
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} |
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} |
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|
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// From https://solidity-by-example.org/array/ |
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