update collection methods

changes the methods like first(), last() and random()

src/utils/collection.ts

@@ -11,20 +11,37 @@ export class Collection<K = string, V = any> extends Map<K, V> {
   }
 
   /** Get first value in Collection */
-  first(): V {
+  first(): V | undefined;
-    return this.values().next().value
+	first(amount: number): V[];
-  }
+	first(amount?: number): V | V[] | undefined {
+		if (typeof amount === 'undefined') return this.values().next().value
+		if (amount < 0) return this.last(amount * -1)
+		amount = Math.min(this.size, amount)
+		const iter = this.values()
+		return Array.from({ length: amount }, (): V => iter.next().value)
+	}
 
   /** Get last value in Collection */
-  last(): V {
+  last(): V | undefined;
-    return [...this.values()][this.size - 1]
+	last(amount: number): V[];
-  }
+	last(amount?: number): V | V[] | undefined {
+		const arr = this.array()
+		if (typeof amount === 'undefined') return arr[arr.length - 1]
+		if (amount < 0) return this.first(amount * -1)
+		if (!amount) return []
+		return arr.slice(-amount)
+	}
 
   /** Get a random value from Collection */
-  random(): V {
+  random(): V;
-    const arr = [...this.values()]
+	random(amount: number): V[];
-    return arr[Math.floor(Math.random() * arr.length)]
+	random(amount?: number): V | V[] {
-  }
+		let arr = this.array()
+		if (typeof amount === 'undefined') return arr[Math.floor(Math.random() * arr.length)]
+		if (arr.length === 0 || !amount) return []
+		arr = arr.slice()
+		return Array.from({ length: amount }, (): V => arr.splice(Math.floor(Math.random() * arr.length), 1)[0])
+	}
 
   /** Find a value from Collection using callback */
   find(callback: (value: V, key: K) => boolean): V | undefined {