ts

19.ts/面向对象/src/7.泛型.ts

@@ -0,0 +1,32 @@
+(function() {
+    //  泛型：先用字符去指代未知类型 使用时在传入具体的类型
+    // function fn1<T>(name:T):T {
+    //     return name;
+    // }
+    // fn1(12);
+    // fn1('22');
+
+    function fn1<T,W>(name:T,x:W):[T,W] {
+        return [name,x];
+    }
+    fn1(12,12);
+    fn1('22','ss');
+
+    interface happy {
+        jump:string
+    }
+    function fn3<T extends happy>(a:T):T {
+        return a;
+    }
+    fn3({jump:'1212'})
+
+    class Ending<T extends happy> {
+        name:T;
+        constructor(name:T) {
+            this.name = name;
+        }
+    }
+
+    let e = new Ending({jump:'1212'})
+    // Omit Pick区别
+})()