08 done

08/script.js

@@ -90,4 +90,61 @@ function filter(obj) {
 
 console.log(filter(phone));
 
-//-----------------------------------------------------------object map--------------------------------------------------------------------
+//-----------------------------------------------------------object map--------------------------------------------------------------------
+
+let someObject = {
+    name: "Иван",
+    age: 17
+};
+
+function map(obj) {
+    let temp = {};
+    for (let i in obj) {
+        temp[i + '_'] = i + '$';
+    }
+    return temp;
+}
+
+console.log(map(someObject));
+
+//-----------------------------------------------------------recursion--------------------------------------------------------------------
+
+// a1 + function (a1, inc) {
+//     return a1 + inc
+// }
+
+// function arithmeticProgression(num, increment, rows) {
+//     for (let i = 0; i < rows; i++) {
+//         return num + arithmeticProgression(num + increment)
+//     }
+// }
+
+function arithmeticProgression(num, increment, rows) {
+    if (rows <= 1) {
+        return num;
+    }
+    return num + arithmeticProgression(num + increment, increment, rows - 1)
+}
+
+console.log(arithmeticProgression(1, 4, 8));
+
+
+function construct(obj) {
+    let node = obj.tagName;
+    if ("attr" in obj) {
+        for (let attrName in obj.attrs) {
+            node.setAttribute(attrName, obj.attrs[attrsName])
+        }
+    }
+
+    if("subtags" in obj) {
+        for(let child in obj.subtags) {
+            construct(obj.subtags[child]);
+        }
+    }
+
+    if("text" in obj) {
+        node.innerText = obj.text;
+    }
+}
+