From d9bba749797b96498d619312f79f4e6bdc4d2b6a Mon Sep 17 00:00:00 2001
From: mhrooz <cxyoz@outlook.com>
Date: Tue, 18 Jun 2024 00:11:16 +0200
Subject: [PATCH] Iterables: add a [Symbol.Iterable] to make the object
 iterable so that the object can use for of loop the [Symbol.Iterable] is a
 function, it should return a object includesdone and value Array.from method
 can return Array.from a arraylike object and iterable object string can be
 used in array.from as well

---
 5.5Iterables/t.js | 55 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 5.5Iterables/t.js

diff --git a/5.5Iterables/t.js b/5.5Iterables/t.js
new file mode 100644
index 0000000..9c8608f
--- /dev/null
+++ b/5.5Iterables/t.js
@@ -0,0 +1,55 @@
+let range = {
+				from: 1,
+				to: 5
+}
+
+range[Symbol.iterator] = function(){
+
+	return {
+		current: this.from,
+		last: this.to,
+		
+		next(){
+			if(this.current <= this.last){
+				return {done: false, value: this.current++};
+			} else {
+				return {done: true};
+			}
+		}
+	}
+};
+
+
+for(let num of range){
+	console.log(num);
+}
+
+for(let ch of "tests"){
+	console.log(ch)
+}
+
+let arrayLike = {
+	0: "Hello",
+	1: "World",
+	length: 2
+};
+
+// Array.from
+let arr = Array.from(arrayLike);
+console.log(arr.pop()); // World
+arr = Array.from(range);
+console.log(arr); //1, 2, 3, 4, 5
+arr = Array.from(range, num => num * num);
+console.log(arr); //1, 4, 9, 16, 25
+
+let s = "split";
+let split_s = s.split('');
+let arr_s = Array.from(s);
+console.log(split_s);
+console.log(split_s[0]);
+console.log(split_s[1]);
+console.log(split_s.length);
+console.log(arr_s);
+console.log(arr_s[0]);
+console.log(arr_s[1]);
+console.log(arr_s.length);