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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.4; | |
import "@openzeppelin/contracts/utils/Counters.sol"; | |
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol"; | |
import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; | |
import "hardhat/console.sol"; | |
contract NFTMarketplace is ERC721URIStorage { |
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using System; | |
using System.Threading.Tasks; | |
namespace System.Collections.Concurrent | |
{ | |
public static class ConcurrentDictionaryExtensions | |
{ | |
/// <summary> | |
/// Provides an alternative to <see cref="ConcurrentDictionary{TKey, TValue}.GetOrAdd(TKey, Func{TKey, TValue})"/> that disposes values that implement <see cref="IDisposable"/>. | |
/// </summary> |
Key/Command | Description |
---|---|
Tab | Auto-complete files and folder names |
Ctrl + A | Go to the beginning of the line you are currently typing on |
Ctrl + E | Go to the end of the line you are currently typing on |
Ctrl + U | Clear the line before the cursor |
Ctrl + K | Clear the line after the cursor |
Ctrl + W | Delete the word before the cursor |
Ctrl + T | Swap the last two characters before the cursor |
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using System; | |
using Newtonsoft.Json; | |
namespace JsonConverters | |
{ | |
/// <summary> | |
/// Handles converting JSON string values into a C# boolean data type. | |
/// </summary> | |
public class BooleanJsonConverter : JsonConverter | |
{ |