did 6

add-eventing/add-eventing.js

@@ -1,4 +1,20 @@
 const addEventing = function (obj) {
+    obj.on = (eventName, fn) => {
+        if (events[eventName]) {
+          events[eventName].push(fn)
+        } else {
+          events[eventName] = [fn]
+        }
+      }
+
+      obj.trigger = (eventName, ...args) => {
+        events[eventName].forEach(fn => fn(...args))
+      }
+
+      return obj
+
+
+
 }
 
 module.exports = addEventing

babylonian-method/babylonian.js

@@ -1,5 +1,12 @@
 const squareRoot = (radicand) => {
+  for (let i = radicand; i >= 1; i--) {
+    if (i * i == radicand) {
+      radicand = i;
+      break;
+    }
+  }
   return radicand
+
 }
 
 module.exports = squareRoot

balanced-parens/balanced-parens.js

@@ -1,5 +1,43 @@
 const parensAreBalanced = (input) => {
-  return false
+  // let stack = [];
+  // let map = {
+  //     '(': ')',
+  //     '[': ']',
+  //     '{': '}'
+  // }
+
+  // for (let i = 0; i < str.length; i++) {
+
+
+  //     if (str[i] === '(' || str[i] === '{' || str[i] === '[' ) {
+  //         stack.push(str[i]);
+  //     }
+
+  //     else {
+  //         let last = stack.pop();
+
+
+  //         if (str[i] !== map[last]) {
+  //             return false
+  //         };
+  //     }
+  let inputSplt = input.split("");
+  return !inputSplt.reduce((prevChar, currChar) => {
+    if (currChar === "(" || currChar === "{" || currChar === "[") {
+      return ++prevChar;
+    } else if (currChar === ")" || currChar === "}" || currChar === "]") {
+      return --prevChar;
+    }
+    return prevChar;
+  }, 0);
+  }
+
+      if (stack.length !== 0) {
+
+          return false
+      };
+
+  return true;
 }
 
 module.exports = parensAreBalanced