feat: add solutions to lc problems: No.2700,2703

Author: yanglbme

solution/2700-2799/2700.Differences Between Two Objects/README.md

@@ -137,7 +137,25 @@ obj2 = {  
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```ts
+function objDiff(obj1: any, obj2: any): any {
+    if (type(obj1) !== type(obj2)) return [obj1, obj2];
+    if (!isObject(obj1)) return obj1 === obj2 ? {} : [obj1, obj2];
+    const diff: Record<string, unknown> = {};
+    const sameKeys = Object.keys(obj1).filter(key => key in obj2);
+    sameKeys.forEach(key => {
+        const subDiff = objDiff(obj1[key], obj2[key]);
+        if (Object.keys(subDiff).length) diff[key] = subDiff;
+    });
+    return diff;
+}
+
+function type(obj: unknown): string {
+    return Object.prototype.toString.call(obj).slice(8, -1);
+}
 
+function isObject(obj: unknown): obj is Record<string, unknown> {
+    return typeof obj === 'object' && obj !== null;
+}
 ```
 
 <!-- tabs:end -->

solution/2700-2799/2700.Differences Between Two Objects/README_EN.md

@@ -129,7 +129,25 @@ obj2 = {  
 ### **TypeScript**
 
 ```ts
+function objDiff(obj1: any, obj2: any): any {
+    if (type(obj1) !== type(obj2)) return [obj1, obj2];
+    if (!isObject(obj1)) return obj1 === obj2 ? {} : [obj1, obj2];
+    const diff: Record<string, unknown> = {};
+    const sameKeys = Object.keys(obj1).filter(key => key in obj2);
+    sameKeys.forEach(key => {
+        const subDiff = objDiff(obj1[key], obj2[key]);
+        if (Object.keys(subDiff).length) diff[key] = subDiff;
+    });
+    return diff;
+}
+
+function type(obj: unknown): string {
+    return Object.prototype.toString.call(obj).slice(8, -1);
+}
 
+function isObject(obj: unknown): obj is Record<string, unknown> {
+    return typeof obj === 'object' && obj !== null;
+}
 ```
 
 <!-- tabs:end -->

solution/2700-2799/2700.Differences Between Two Objects/Solution.ts

@@ -0,0 +1,19 @@
+function objDiff(obj1: any, obj2: any): any {
+    if (type(obj1) !== type(obj2)) return [obj1, obj2];
+    if (!isObject(obj1)) return obj1 === obj2 ? {} : [obj1, obj2];
+    const diff: Record<string, unknown> = {};
+    const sameKeys = Object.keys(obj1).filter(key => key in obj2);
+    sameKeys.forEach(key => {
+        const subDiff = objDiff(obj1[key], obj2[key]);
+        if (Object.keys(subDiff).length) diff[key] = subDiff;
+    });
+    return diff;
+}
+
+function type(obj: unknown): string {
+    return Object.prototype.toString.call(obj).slice(8, -1);
+}
+
+function isObject(obj: unknown): obj is Record<string, unknown> {
+    return typeof obj === 'object' && obj !== null;
+}

solution/2700-2799/2703.Return Length of Arguments Passed/README.md

@@ -50,7 +50,13 @@ Three values were passed to the function so it should return 3.
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```ts
+function argumentsLength(...args: any[]): number {
+    return args.length;
+}
 
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */
 ```
 
 <!-- tabs:end -->

solution/2700-2799/2703.Return Length of Arguments Passed/README_EN.md

@@ -44,7 +44,13 @@ Three values were passed to the function so it should return 3.
 ### **TypeScript**
 
 ```ts
+function argumentsLength(...args: any[]): number {
+    return args.length;
+}
 
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */
 ```
 
 <!-- tabs:end -->

solution/2700-2799/2703.Return Length of Arguments Passed/Solution.ts

@@ -0,0 +1,7 @@
+function argumentsLength(...args: any[]): number {
+    return args.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */