CS6

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

CS6

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

CS6

import React, { useState, useRef, useContext, useCallback } from 'react';
import { Dimensions, View, Animated } from 'react-native';
import { TabView } from 'react-native-tab-view';
import { TabScreen } from './Tab';
import { CustomTabBar } from './TabBar';
import { ThemeContext } from 'react-native-elements';
import { useHeaderHeight } from '@react-navigation/stack';
const AnimatedHeader = ({ style, content }) => {
  return <Animated.View style={style}>{content}</Animated.View>;
};

CS6

const THREE = require('three');
const { createCanvas, loadImage } = require('canvas')
const { Blob, FileReader } = require('vblob');

// Patch global scope to imitate browser environment.
global.window = global;
global.Blob = Blob;
global.FileReader = FileReader;
global.THREE = THREE;

CS6

import React from 'react'
import { StyleSheet } from 'react-native'
import Animated, {
  Extrapolate,
  interpolate,
  useAnimatedStyle
} from 'react-native-reanimated'
import { colors, metrics } from 'styles';

function clamp(value, lowerBound, upperBound) {

CS6

import * as React from "react";
import styled from "styled-components";
import lottie from "lottie-web";
import { up } from "styled-breakpoints";

import { isServer } from "client/consts/env";

const Container = styled.div`
  width: 100vw;
  height: 100vh;

CS6

MariaDB Temporal Table

[TOC]

Description

This is a HOWTO for database record/value version control, not for schema.

With MariaDB, now we can Versioning database records (values) WITH SYSTEM VERSIONING. Once we have tables configured correctly, Data Versions will be generated automatically everytime we have new data inserted or values updated.

CS6

#!/bin/bash
function jsonval {
    temp=`echo $json | sed 's/\\\\\//\//g' | sed 's/[{}]//g' | awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}' | sed 's/\"\:\"/\|/g' | sed 's/[\,]/ /g' | sed 's/\"//g' | grep -w $prop`
    echo ${temp##*|}
}

json=`curl -s -X GET http://twitter.com/users/show/$1.json`
prop='profile_image_url'
picurl=`jsonval`

CS6

Python Socket 编程详细介绍

Python 提供了两个基本的 socket 模块：

• Socket 它提供了标准的BSD Socket API。
• SocketServer 它提供了服务器重心，可以简化网络服务器的开发。

下面讲解下 Socket模块功能。

Socket 类型