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【AI时代的设计模式：LSP原则的智能应用】

creditCard = new CreditCard("987654321"15003000); // 储蓄卡操作 System.out.println("...(500); // 存款 creditCard.withdraw(4500); // 取款（透支） creditCard.checkBalance(); //...当前余额：" + balance + "元"); } } 子类 CreditCard（信用卡） CreditCard 继承 SavingsCard，并重写了 withdraw 方法，支持透支。...(500); // 存款 creditCard.withdraw(4500); // 取款（透支） creditCard.checkBalance(); //...子类的行为定制： SavingsCard 和 CreditCard 各自根据自己的业务需求重写了 withdraw 方法： SavingsCard 只允许在余额范围内取款； CreditCard

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模拟实现ATM+购物商城程序

if creditcard_id in _creditcard_data.keys(): passwd = _creditcard_data[creditcard_id...limitcash = creditcard_data[creditcard]["limitcash"] totalbill = creditcard_data[creditcard...[creditcard]["limitcash"] -= total_cash creditcard_data[creditcard]["limit"]...limit = _creditcard_data[creditcard_id]["limit"] limitcash = _creditcard_data..._creditcard_data[creditcard_id]["limitcash"] -= money _creditcard_data[creditcard_id

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存折与信用卡（继承）Python

account.datain() account.check() account.deposit() account.check() account.withdraw() account.check() creditcard...=CCreditcard() creditcard.datain() creditcard.check() creditcard.deposit() creditcard.check() creditcard.withdraw...() creditcard.check()

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Neo4j之cypher语句

客户节点包含：ID，姓名，出生日期属性 CreditCard节点包含：id，number，cvv，expiredate属性客户与信用卡关系：DOSHOPPINGWITH CreditCard到客户关系...：ASSOCIATED_WITH 我们将在以下步骤中处理此示例：创建客户节点创建CreditCard节点观察先前创建的两个节点：Customer和CreditCard 创建客户和CreditCard...cc和CreditCard分别是CreditCard节点的节点名和节点标签名。...]->(cc) RETURN r 与现有节点的属性的关系 MATCH (cust:Customer),(cc:CreditCard) CREATE (cust)-[r:DO_SHOPPING_WITH...cc和CreditCard分别是CreditCard节点的节点名和节点标签名。

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告别贫血枚举！用C#强类型枚举模式实现真正的面向对象设计

> { protected CreditCard(int valuestring name) : base(valuename) { } publicabstractdecimal...Discount { get; } // 静态实例 publicstaticreadonly CreditCard Standard = new StandardCard();...publicstaticreadonly CreditCard Premium = new PremiumCard(); publicstaticreadonly CreditCard Platinum...= new PlatinumCard(); // 私有子类封装行为 privatesealedclassStandardCard : CreditCard {...") { } publicoverridedecimal Discount => 0.05m; } privatesealedclassPlatinumCard : CreditCard

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C# 中的“智能枚举”：如何在枚举中增加行为

/// /// 信用卡 /// public abstract class CreditCard : EnumerationCreditCard> {...public static readonly CreditCard Gold = new GoldCreditCard(); public static readonly CreditCard...(); public static readonly CreditCard None = new NoneCreditCard(); private CreditCard(int...例如，可以通过 CreditCard.Gold 来引用 Gold 信用卡的实例，并获取它的折扣率。在需要使用信用卡类型的地方，也可以直接使用 CreditCard 类型来表示。...而 CreditCard 类中的静态实例则表示四种不同的信用卡类型。通过这种方式，我们可以轻松地定义和使用不同类型的信用卡，并在需要使用信用卡类型的地方直接使用 CreditCard 类型来表示。

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R语言拟合决策树模型分析

❞ 加载R包 library(tidyverse) library(caTools) 导入数据 creditcard_data creditcard.csv") 数据清洗...creditcard_data$Amount = scale(creditcard_data$Amount) # 对Amount列进行标准化处理 NewData = creditcard_data[,...rpart.plot) # 用于决策树的可视化 # 使用决策树模型进行训练，并将模型存储在decisionTree_model变量中 decisionTree_model creditcard_data...method = 'class') # 使用决策树模型进行预测，将预测值存储在predicted_val变量中 predicted_val creditcard_data...type = 'class') # 计算预测的概率，并存储在probability变量中 probability creditcard_data

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C#的“智能枚举”：在枚举中增加行为？

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设计模式 - 六大设计原则之LSP（里氏替换）

() { CreditCard creditCard = new CreditCard(); // 支付 creditCard.withdrawal("100001...(CreditCard.class); public CreditCard(String cardNoString cardDate) { super(cardNocardDate...(){ CreditCard creditCard = new CreditCard("123456""2023-01-01"); // 支付，贷款...creditCard.loan("100001"new BigDecimal(100)); // 还款 creditCard.repayment("100001",...类："); CashCard creditCard = new CreditCard("123456""2023-01-01"); // 提现 creditCard.withdrawal

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gorm 教程二

// 用户有一个信用卡，CredtCardID 外键type User struct { gorm.Model CreditCard CreditCard}type CreditCard...如果你想使用另一个字段来保存这个关系，你可以通过使用标签 foreignkey 来改变它，例如：type User struct { gorm.Model CreditCard CreditCard...type User struct { gorm.Model CreditCard CreditCard `gorm:"association_foreignkey:Number"`}type CreditCard...user_id = 123; // 123 是用户表的主键// CreditCard 是用户表的字段名，这意味着获取用户的信用卡关系并写入变量 card。...// 用户有多张信用卡，UserID 是外键type User struct { gorm.Model CreditCards []CreditCard}type CreditCard struct

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行业案例 | 数据分析在银行业应用之欺诈检测

我们将用到 creditcard_data 数据集。...import pandas as pd creditcard_data = pd.read_csv('creditcard_data.csv'index_col=0) print(creditcard_data.info...()) print('\n') pd.options.display.max_columns = len(creditcard_data) print(creditcard_data.head(3))...接着计算欺诈交易占数据集中交易总数的百分比： round(creditcard_data['Class'].value_counts()*100/len(creditcard_data)).convert_dtypes...['V1']creditcard_data['V3']<-5)10) print(pd.crosstab(creditcard_data['Class']creditcard_data

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Spring 微服务中如何消除 switch case？

paymentMethod) { case "Paypal": return new PaypalPaymentStrategy(); case "CreditCard...paymentMethod) { case "Paypal": return new PaypalPayment(); case "CreditCard...paymentMethod) { case "Paypal": return paypalPaymentStrategy; case "CreditCard...@Qualifier("paypal") private PaymentStrategy paypalPaymentStrategy; @Autowired @Qualifier("creditCard...strategies.put("Paypal"amount -> { // 实现 PayPal 支付逻辑 }); strategies.put("CreditCard

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gorm查询嵌套结构体，嵌套预加载preload，关联，外键foreignkey，引用references

// User 有多张 CreditCard，UserID 是外键 // type User struct {——主表 // gorm.Model // CreditCards []CreditCard...// } // type CreditCard struct {——从表 // gorm.Model // Number string // UserID uint——这个是默认外键（主表名...ID和created等 // } // type User struct { // gorm.Model // MemberNumber string // CreditCards []CreditCard...// type CreditCard struct { // gorm.Model // Number string // UserNumber string——外键，这个值等于User

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存折与信用卡（继承）

<<endl; } }; int main() { CAccount Account; CCreditcard Creditcard; Account.datain(); Account.check...(); Account.deposit(); Account.check(); Account.withdraw(); Account.check(); Creditcard.datain()...; Creditcard.check(); Creditcard.deposit(); Creditcard.check(); Creditcard.withdraw(); Creditcard.check

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Golang如何才能写出值得阅读的代码

const ( CREDITCARD = "creditCard" BANKCARD = "BankCard" ) 编写我们的函数 func (w *Wallet) Deposit...(amount intcard string) { switch card { case CREDITCARD: w.creditbalance += creditCard...func (w *Wallet) Withdraw(amount intcard string) error { switch card { case CREDITCARD:...if creditCard(amount) > w.creditbalance { return InsufficientFundsError }...w.creditbalance -= creditCard(amount) case BANKCARD: if BankCard(amount) > w.Bankbalance

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Google 开源的依赖注入库，比 Spring 更小更快！

*/ Receipt chargeOrder(PizzaOrder orderCreditCard creditCard); } 使用new的方式获取信用卡支付处理器和数据库交易日志记录器：...creditCard) { CreditCardProcessor processor = new PaypalCreditCardProcessor(); TransactionLog...creditCard) { try { ChargeResult result = processor.charge(creditCardorder.getAmount());...creditCard = new CreditCard("1234"112010); private final InMemoryTransactionLog transactionLog...creditCard) { try { ChargeResult result = processor.charge(creditCardorder.getAmount());

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Google 开源的依赖注入库，比 Spring 更小更快！

*/ Receipt chargeOrder(PizzaOrder orderCreditCard creditCard); } 使用new的方式获取信用卡支付处理器和数据库交易日志记录器： public...creditCard) { CreditCardProcessor processor = new PaypalCreditCardProcessor(); TransactionLog...creditCard) { try { ChargeResult result = processor.charge(creditCardorder.getAmount());...creditCard = new CreditCard("1234"112010); private final InMemoryTransactionLog transactionLog...creditCard) { try { ChargeResult result = processor.charge(creditCardorder.getAmount());

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Gorm 关联关系介绍与基本使用

// User 有一张 CreditCard，UserID 是外键 type User struct { gorm.Model CreditCard CreditCard // 与CreditCard...如果你想要使用另一个字段来保存该关系，你同样可以使用标签 foreignKey 来更改它，例如： type User struct { gorm.Model CreditCard CreditCard...CreditCard `gorm:"foreignkey:UserName;references:name"` // 信用卡表的UserName字段跟用户表Name字段关联 } type CreditCard...CreditCard `gorm:"constraint:OnUpdate:CASCADE,OnDelete:SET NULL;"` } type CreditCard struct { gorm.Model...// User 有多张 CreditCard，UserID 是外键 type User struct { gorm.Model CreditCards []CreditCard } type

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Guice学习原

00 * @version 1.0 * @since 1.0 */ public interface CreditCardProcessor { ChargeResult charge(CreditCard...PaypalCreditCardProcessorImpl implements CreditCardProcessor { @Override public ChargeResult charge(CreditCard...1.0 * @since 1.0 */ public interface BillingService { Receipt chargeOrder(PizzaOrder orderCreditCard...this.transactionLog = transactionLog; } @Override public Receipt chargeOrder(PizzaOrder orderCreditCard...injector.getInstance(BillingService.class); billingService.chargeOrder(new PizzaOrder()new CreditCard

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gorm jion查询映射（扫描scan）到新的自定义嵌套结构体struct，必须使用select规定字段，与xorm的jion对比

MemberNumber // 4.用preload来查询关联，preload中的名字必须是主表中的字段名，不是从表名 // 5.必须是gorm建立的表才能这样用，beego orm建立的表无效 // User 有多张 CreditCard...，UserID 是外键 // type User struct {——主表 // gorm.Model // CreditCards []CreditCard // } // type CreditCard...ID和created等 // } // type User struct { // gorm.Model // MemberNumber string // CreditCards []CreditCard...`gorm:"foreignKey:UserNumber;references:MemberNumber"` // } // type CreditCard struct { // gorm.Model

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点击加载更多

【AI时代的设计模式：LSP原则的智能应用】

模拟实现ATM+购物商城程序

存折与信用卡（继承）Python

Neo4j之cypher语句

告别贫血枚举！用C#强类型枚举模式实现真正的面向对象设计

C# 中的“智能枚举”：如何在枚举中增加行为

R语言拟合决策树模型分析

C#的“智能枚举”：在枚举中增加行为？

设计模式 - 六大设计原则之LSP（里氏替换）

gorm 教程二

行业案例 | 数据分析在银行业应用之欺诈检测

Spring 微服务中如何消除 switch case？

gorm查询嵌套结构体，嵌套预加载preload，关联，外键foreignkey，引用references

存折与信用卡（继承）

Golang如何才能写出值得阅读的代码

Google 开源的依赖注入库，比 Spring 更小更快！

Google 开源的依赖注入库，比 Spring 更小更快！

Gorm 关联关系介绍与基本使用

Guice学习原

gorm jion查询映射（扫描scan）到新的自定义嵌套结构体struct，必须使用select规定字段，与xorm的jion对比

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