Merge pull request #88 from GuoXiCheng/dev-c

update docs

src/.vuepress/theme.ts

@@ -99,7 +99,7 @@ export default hopeTheme({
       cachePic: true,
       appendBase: true,
       themeColor: "#000000",
-      update: 'disable',
+      update: 'force',
       apple: {
         icon: "/assets/icon/apple-icon-152.png",
         statusBarColor: "black",

src/design-pattern/behavioral/strategy.md

@@ -0,0 +1,58 @@
+# 策略模式
+
+::: playground#ts 策略模式交互演示
+
+@file index.ts
+
+```ts
+interface TaxStrategy {
+    caculateTax(amount: number): number;
+}
+
+class USATaxStrategy implements TaxStrategy {
+    caculateTax(amount: number) {
+        return amount * 0.2;
+    }
+}
+
+class ChinaTaxStrategy implements TaxStrategy {
+    caculateTax(amount: number) {
+        return amount * 0.1;
+    }
+}
+
+class TaxCalculate {
+    private strategy: TaxStrategy;
+
+    constructor(taxStrategy: TaxStrategy) {
+        this.strategy = taxStrategy;
+    }
+
+    calculate(amount: number): number {
+        return this.strategy.caculateTax(amount);
+    }
+}
+
+function calculateByCounty(country: "USA" | "China", amount: number) {
+    let strategy: TaxStrategy;
+    switch(country) {
+        case "USA":
+            strategy = new USATaxStrategy();
+            break;
+        case "China":
+            strategy = new ChinaTaxStrategy();
+            break;
+        default:
+            throw new Error("not found");
+    }
+    return new TaxCalculate(strategy).calculate(amount);
+}
+
+const calculateByUSA = calculateByCounty("USA", 10);
+console.log(calculateByUSA);
+
+const calculateByChina = calculateByCounty("China", 10);
+console.log(calculateByChina);
+```
+
+:::