added: typescript hash func

codes/typescript/chapter_hashing/array_hash_map.ts

@@ -0,0 +1,137 @@
+/* 键值对 int->String */
+class Entry {
+  public key: number;
+  public val: string;
+  constructor(key: number, val: string) {
+    this.key = key;
+    this.val = val;
+  }
+}
+
+/* 数组的初始化和基本操作 */
+class ArrayList {
+
+  private readonly elements: Entry[];
+  constructor(length: number) {
+    this.elements = new Array(length);
+    this.initialize();
+  }
+
+  /* 初始化 */
+  private initialize() {
+    this.elements.fill(null as any, 0, this.elements.length - 1);
+  }
+
+  /* 新增和删除 */
+  public set(key: number, val: string | null) {
+    this.isOutOfRange(key);
+    if (val !== null) {
+      this.elements[key] = new Entry(key, val);
+    }
+    this.elements[key] = null as any;
+  }
+
+  /* 获取 */
+  public get(key: number): string {
+    return this.elements[key].val;
+  }
+
+  public entrySet() {
+    let arr = [];
+    for (let i = 0; i < this.elements.length; i++) {
+      if (this.elements[i] !== null) {
+        arr.push(this.elements[i]);
+      }
+    }
+    return arr;
+  }
+
+  public valueSet() {
+    let arr = [];
+    for (let i = 0; i < this.elements.length; i++) {
+      if (this.elements[i] !== null) {
+        arr.push(this.elements[i].val);
+      }
+    }
+    return arr;
+  }
+
+  public keySet() {
+    let arr = [];
+    for (let i = 0; i < this.elements.length; i++) {
+      if (this.elements[i] !== null) {
+        arr.push(this.elements[i].key);
+      }
+    }
+    return arr;
+  }
+
+  private isOutOfRange(key: number) {
+    if (key > this.elements.length - 1) {
+      throw new Error('Out of array range');
+    }
+  }
+}
+
+/* 基于数组简易实现的哈希表 */
+class ArrayHashMap {
+  // 初始化一个长度为 100 的桶（数组）
+  private bucket: ArrayList;
+
+  constructor() {
+    this.bucket = new ArrayList(100);
+  }
+
+  /* 哈希函数 */
+  private hashFunc(key: number): number {
+    return key % 100;
+  }
+
+  /* 查询操作 */
+  public get(key: number): string | null {
+    let index = this.hashFunc(key);
+    let val = this.bucket.get(index);
+    if (val === null) {
+      return null;
+    }
+    return val;
+  }
+
+  /* 添加操作 */
+  public put(key: number, val: string) {
+    let index = this.hashFunc(key);
+    this.bucket.set(index, val);
+  }
+
+  /* 删除操作 */
+  public remove(key: number) {
+    let index = this.hashFunc(key);
+    // 置为 null ，代表删除
+    this.bucket.set(index, null);
+  }
+
+  /* 获取所有键值对 */
+  public entrySet(): Entry[] {
+    return this.bucket.entrySet();
+  }
+
+  /* 获取所有键 */
+  public keySet(): number[] {
+    return this.bucket.keySet();
+  }
+
+  /* 获取所有值 */
+  public valueSet(): string[] {
+    return this.bucket.valueSet();
+  }
+
+/* 打印哈希表 */
+  public print() {
+    let entrySet = this.entrySet();
+    for (const entry of entrySet) {
+      console.info(`${entry.key} -> ${entry.val}`);
+    }
+  }
+}
+
+export default ArrayHashMap;

codes/typescript/chapter_hashing/hash_map.ts

@@ -0,0 +1,45 @@
+import ArrayHashMap from './array_hash_map';
+
+class HashMap {
+
+  constructor() {
+    /* 初始化哈希表 */
+    const map = new ArrayHashMap();
+    /* 添加操作 */
+    // 在哈希表中添加键值对 (key, value)
+    map.put(12836, '小哈');
+    map.put(15937, '小啰');
+    map.put(16750, '小算');
+    map.put(13276, '小法');
+    map.put(10583, '小鸭');
+    console.info('\n添加完成后，哈希表为\nKey -> Value');
+    map.print();
+
+    /* 查询操作 */
+    // 向哈希表输入键 key ，得到值 value
+    let name = map.get(15937);
+    console.info('\n输入学号 15937 ，查询到姓名 ' + name);
+
+    /* 删除操作 */
+    // 在哈希表中删除键值对 (key, value)
+    map.remove(10583);
+    console.info('\n删除 10583 后，哈希表为\nKey -> Value');
+    map.print();
+
+    /* 遍历哈希表 */
+    console.info('\n遍历键值对 Key->Value');
+    for (const entry of map.entrySet()) {
+      console.info(entry.key + ' -> ' + entry.val);
+    }
+    console.info('\n单独遍历键 Key');
+    for (const key of map.keySet()) {
+      console.info(key);
+    }
+    console.info('\n单独遍历值 Value');
+    for (const val of map.valueSet()) {
+      console.info(val);
+    }
+  }
+}
+
+export default HashMap;

codes/typescript/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "es6",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "module": "esnext",
+    "strict": true,
+    "importHelpers": true,
+    "noEmit": false,
+    "sourceMap": true,
+    "baseUrl": ".",
+    "esModuleInterop": true,
+    "downlevelIteration": true,
+  },
+  "include": ["./**/*"],
+}

docs/chapter_hashing/hash_map.md

@@ -138,7 +138,28 @@ comments: true
 === "TypeScript"
 
     ```typescript title="hash_map.ts"
+    /* 初始化哈希表 */
+    const map = new ArrayHashMap();
+    /* 添加操作 */
+    // 在哈希表中添加键值对 (key, value)
+    map.put(12836, '小哈');
+    map.put(15937, '小啰');
+    map.put(16750, '小算');
+    map.put(13276, '小法');
+    map.put(10583, '小鸭');
+    console.info('\n添加完成后，哈希表为\nKey -> Value');
+    map.print();
+
+    /* 查询操作 */
+    // 向哈希表输入键 key ，得到值 value
+    let name = map.get(15937);
+    console.info('\n输入学号 15937 ，查询到姓名 ' + name);
 
+    /* 删除操作 */
+    // 在哈希表中删除键值对 (key, value)
+    map.remove(10583);
+    console.info('\n删除 10583 后，哈希表为\nKey -> Value');
+    map.print();
     ```
 
 === "C"
@@ -233,7 +254,19 @@ comments: true
 === "TypeScript"
 
     ```typescript title="hash_map.ts"
-
+    /* 遍历哈希表 */
+    console.info('\n遍历键值对 Key->Value');
+    for (const entry of map.entrySet()) {
+      console.info(entry.key + ' -> ' + entry.val);
+    }
+    console.info('\n单独遍历键 Key');
+    for (const key of map.keySet()) {
+      console.info(key);
+    }
+    console.info('\n单独遍历值 Value');
+    for (const val of map.valueSet()) {
+      console.info(val);
+    }
     ```
 
 === "C"
@@ -477,7 +510,80 @@ $$
 === "TypeScript"
 
     ```typescript title="array_hash_map.ts"
-
+    /* 键值对 int->String */
+    class Entry {
+        public key: number;
+        public val: string;
+        constructor(key: number, val: string) {
+            this.key = key;
+            this.val = val;
+        }
+    }
+    
+    /* 数组的初始化和基本操作 */
+    class ArrayList {
+    
+        private readonly elements: Entry[];
+        constructor(length: number) {
+            this.elements = new Array(length);
+            this.initialize();
+        }
+    
+        /* 初始化 */
+        private initialize() {
+            this.elements.fill(null as any, 0, this.elements.length - 1);
+        }
+        
+        /* 新增和删除 */
+        public set(key: number, val: string | null) {
+            this.isOutOfRange(key);
+            if (val !== null) {
+                this.elements[key] = new Entry(key, val);
+            }
+            this.elements[key] = null as any;
+        }
+        
+        /* 获取 */
+        public get(key: number): string {
+            return this.elements[key].val;
+        }
+        
+        public entrySet() {
+            let arr = [];
+            for (let i = 0; i < this.elements.length; i++) {
+                if (this.elements[i] !== null) {
+                    arr.push(this.elements[i]);
+                }
+            }
+            return arr;
+        }
+        
+        public valueSet() {
+            let arr = [];
+            for (let i = 0; i < this.elements.length; i++) {
+                if (this.elements[i] !== null) {
+                    arr.push(this.elements[i].val);
+                }
+            }
+            return arr;
+        }
+        
+        public keySet() {
+            let arr = [];
+            for (let i = 0; i < this.elements.length; i++) {
+                if (this.elements[i] !== null) {
+                    arr.push(this.elements[i].key);
+                }
+            }
+            return arr;
+        }
+        
+        private isOutOfRange(key: number) {
+            if (key > this.elements.length - 1) {
+                throw new Error('Out of array range');
+            }
+        }
+    }
     ```
 
 === "C"

hello-algo.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/codes/java" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>