Created array subclass with safeGetter

src/utils/safeGetters.ts

@@ -0,0 +1,47 @@
+export class SafeArray<T> extends Array<T> {
+  
+  public static override from<T>(array: T[]): SafeArray<T> {
+    return new SafeArray(array);
+  }
+
+  constructor(array: T[]) {
+    super(array.length);
+    array.forEach((element, index) => {
+      this[index] = element;
+    })
+  }
+
+  public toArray(): T[] {
+    return [...this];
+  }
+
+  public override map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): SafeArray<U> {
+    return new SafeArray(super.map(callbackfn, thisArg));
+  }
+
+  public override filter(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): SafeArray<T> {
+    return new SafeArray(super.filter(callbackfn, thisArg));
+  }
+
+  public get<T>(this: SafeArray<T>, index: number): T {
+    const value = this.at(index);
+    if (value === undefined) {
+      throw new Error(`Element at index ${index} is undefined. Array: ${this}`)
+    }
+    return value
+  }
+
+  public last<T>(this: SafeArray<T>): T {
+    return this.get(this.length - 1)
+  }
+
+  public first<T>(this: SafeArray<T>): T {
+    return this.get(0)
+  }
+}
+
+export function safeGet<V>(obj: Partial<Record<string, V>>, key: string, errorMessage?: string) {
+  const value = obj[key];
+  if (value === undefined) throw new Error(`Key '${key.toString()}' not found in object. Available keys: ${Object.keys(obj).join(', ')}.${errorMessage ? ` ${errorMessage}` : ''}`);
+  return value;
+}