feat: add solutions to lc problems: No.2626,2627

* No.2626.Array Reduce Transformation
* No.2627.Debounce

Author: yanglbme

solution/2600-2699/2626.Array Reduce Transformation/README.md

@@ -82,7 +82,15 @@ init = 25
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```ts
-
+type Fn = (accum: number, curr: number) => number;
+
+function reduce(nums: number[], fn: Fn, init: number): number {
+    let acc: number = init;
+    for (const x of nums) {
+        acc = fn(acc, x);
+    }
+    return acc;
+}
 ```
 
 ### **...**

solution/2600-2699/2626.Array Reduce Transformation/README_EN.md

@@ -74,7 +74,15 @@ init = 25
 ### **TypeScript**
 
 ```ts
-
+type Fn = (accum: number, curr: number) => number;
+
+function reduce(nums: number[], fn: Fn, init: number): number {
+    let acc: number = init;
+    for (const x of nums) {
+        acc = fn(acc, x);
+    }
+    return acc;
+}
 ```
 
 ### **...**

solution/2600-2699/2626.Array Reduce Transformation/Solution.ts

@@ -0,0 +1,9 @@
+type Fn = (accum: number, curr: number) => number;
+
+function reduce(nums: number[], fn: Fn, init: number): number {
+    let acc: number = init;
+    for (const x of nums) {
+        acc = fn(acc, x);
+    }
+    return acc;
+}

solution/2600-2699/2627.Debounce/README.md

@@ -97,7 +97,27 @@ calls = [
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```ts
+type F = (...p: any[]) => any;
+
+function debounce(fn: F, t: number): F {
+    let timeout: ReturnType<typeof setTimeout> | undefined;
+
+    return function (...args) {
+        if (timeout !== undefined) {
+            clearTimeout(timeout);
+        }
+        timeout = setTimeout(() => {
+            fn.apply(this, args);
+        }, t);
+    };
+}
 
+/**
+ * const log = debounce(console.log, 100);
+ * log('Hello'); // cancelled
+ * log('Hello'); // cancelled
+ * log('Hello'); // Logged at t=100ms
+ */
 ```
 
 ### **...**

solution/2600-2699/2627.Debounce/README_EN.md

@@ -89,7 +89,27 @@ The 3rd call is delayed by 150ms and ran at 450ms. The inputs were (5, 6).
 ### **TypeScript**
 
 ```ts
+type F = (...p: any[]) => any;
+
+function debounce(fn: F, t: number): F {
+    let timeout: ReturnType<typeof setTimeout> | undefined;
+
+    return function (...args) {
+        if (timeout !== undefined) {
+            clearTimeout(timeout);
+        }
+        timeout = setTimeout(() => {
+            fn.apply(this, args);
+        }, t);
+    };
+}
 
+/**
+ * const log = debounce(console.log, 100);
+ * log('Hello'); // cancelled
+ * log('Hello'); // cancelled
+ * log('Hello'); // Logged at t=100ms
+ */
 ```
 
 ### **...**

solution/2600-2699/2627.Debounce/Solution.ts

@@ -0,0 +1,21 @@
+type F = (...p: any[]) => any;
+
+function debounce(fn: F, t: number): F {
+    let timeout: ReturnType<typeof setTimeout> | undefined;
+
+    return function (...args) {
+        if (timeout !== undefined) {
+            clearTimeout(timeout);
+        }
+        timeout = setTimeout(() => {
+            fn.apply(this, args);
+        }, t);
+    };
+}
+
+/**
+ * const log = debounce(console.log, 100);
+ * log('Hello'); // cancelled
+ * log('Hello'); // cancelled
+ * log('Hello'); // Logged at t=100ms
+ */