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ArrayRemovingElementByReplacingLast

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Aackuser
Last edited Jun 8, 2022
Created on Jun 8, 2022

This example visualizes a Solidity smart contract called Messagebox, which manages an array of string messages and demonstrates the “replace last” technique for deleting array elements. The contract stores messages in a `string[]` public array, tracks the latest timestamp via `lastDate`, and restricts deletion to the owner using a `require` statement. The `deleteMessage` function iterates through the array, compares each entry using `keccak256` hashing, and when a match is found, overwrites it with the last element before calling `messages.pop()`. The code uses Solidity’s built-in array methods (`push`, `pop`, `length`) and `block.timestamp` to record updates, with the visualization showing the contract’s state changes as operations execute.

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