feat: implement custom array class

Author: francislagares

src/arrays/arrayClass.ts

@@ -0,0 +1,64 @@
+class myArray<T> {
+  private length: number;
+  private data: {};
+
+  public constructor(args?: T[]) {
+    this.length = args.length;
+    this.data = {};
+    for (const key in args) {
+      this.data[key] = args[key];
+    }
+  }
+
+  public size(): number {
+    return this.length;
+  }
+
+  public isEmpty(): boolean {
+    return this.length === 0;
+  }
+
+  public get(index: number): number {
+    return this.data[index];
+  }
+
+  public push(item: T): number {
+    this.data[this.length] = item;
+    this.length++;
+    return this.length;
+  }
+
+  public pop(): T {
+    const lastItem = this.data[this.length - 1];
+    delete this.data[this.length - 1];
+    this.length--;
+    return lastItem;
+  }
+
+  public insert(index: number, item: T): object {
+    for (let i = this.length; i >= index; i--) {
+      this.data[i] = this.data[i - 1];
+    }
+    this.data[index] = item;
+    this.length++;
+    return this.data;
+  }
+
+  public prepend(item: T): object {
+    return this.insert(0, item);
+  }
+
+  public delete(index: number): T {
+    const item = this.data[index];
+    this.shiftItems(index);
+    return item;
+  }
+
+  private shiftItems(index: number): void {
+    for (let i = index; i < this.length - 1; i++) {
+      this.data[i] = this.data[i + 1];
+    }
+    delete this.data[this.length - 1];
+    this.length--;
+  }
+}

src/index.ts

@@ -1 +1,2 @@
 console.log('Typescript Data Structures & Algorithms');
+import './arrays/arrayClass';