feat: work hard

docs/interview/experiences/14.202308handwriting.md

@@ -51,6 +51,7 @@ nav:
  * 33.使用睡眠函数实现红绿灯代码，红灯2秒，黄灯1秒，绿灯3秒，循环改变颜色。
  * 34.[1s后输出1 2s后输出2 3s后输出3](https://juejin.cn/post/6920492226594373639?searchId=20230828231941247DD0C17D7CAD3D5286)
  * 35.TS手写联合转交叉
+ * 36.TS实现内置函数Parameters和ReturnTypes
  */
 ```
 

docs/interview/practise/0912.ts

@@ -5,3 +5,88 @@
  * 4.联合转交叉
  * 5.索引转联合
  */
+
+type UU = {
+  age: number;
+  name: string;
+};
+
+type IndexToUnion<T> = {
+  [P in keyof T]: {
+    [K in P]: T[K];
+  };
+}[keyof T];
+type UU2 = IndexToUnion<UU>;
+
+type UU3 =
+  | {
+      age: number;
+    }
+  | {
+      name: string;
+    };
+
+type UnionToIndex<T> = (T extends T ? (x: T) => unknown : never) extends (x: infer R) => unknown
+  ? R
+  : never;
+
+type UUION<T> = (T extends T ? (x: T) => unknown : never) extends (x: infer R) => unknown
+  ? R
+  : never;
+
+function GetName(name: string): string {
+  return name;
+}
+
+type MyParameters<T extends (...args: any) => any> = T extends (...args: infer P) => any
+  ? P
+  : never;
+
+type Parameters<T extends (...args: any) => any> = T extends (...args: infer P) => any ? P : never;
+
+type MyReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R
+  ? R
+  : never;
+
+type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any;
+
+type FnGetParam = MyParameters<typeof GetName>; // [name: string]
+type FnGetReturn = MyReturnType<typeof GetName>; // string
+type UU4 = UnionToIndex<UU3>;
+
+type T631 = '1' | '2' | '3';
+type UnionToTuple<T extends unknown, R extends unknown[] = []> = T extends string ? [T] : R;
+type T632 = UnionToTuple<T631>;
+
+type GetReturnType<Func extends Function> = Func extends (...args: any[]) => infer ReturnType
+  ? ReturnType
+  : never;
+
+import { useEffect, useState } from 'react';
+const useIntersectionObserver = ({ ref, option }) => {
+  const [visible, setVisible] = useState(false);
+  useEffect(() => {
+    const observer = new IntersectionObserver(([entry]) => {
+      setVisible(entry.isIntersecting);
+    });
+    if (ref.current) {
+      observer.observe(ref.current);
+    }
+    return () => {
+      observer.unobserve(ref.current);
+    };
+  }, []);
+  return visible;
+};
+
+function requestIdleCallback(cb) {
+  var start = Date.now();
+  return setTimeout(() => {
+    cb({
+      didTimeout: false,
+      timeRemaining: function () {
+        return Math.max(0, 50 - (Date.now() - start));
+      },
+    });
+  }, 0);
+}

docs/interview/practise/0913.ts

@@ -0,0 +1,4 @@
+/**
+ * 1. TS手写联合转交叉
+ * 2.TS实现内置函数Parameters和ReturnTypes
+ */