задача 3.1 не доделана, не проходит 1 тест. задачи 3.2-3.3 выполнены

03-objects-arrays-intro-to-testing/1-create-getter/index.js

@@ -4,5 +4,12 @@
  * @returns {function} - function-getter which allow get value from object by set path
  */
 export function createGetter(path) {
-
+  const arr = path.split('.');  
+
+  return function(obj) {
+    if (!obj.hasOwnProperty(arr[0])) return ;
+    return arr.reduce((accum, item)=> 
+      accum.hasOwnProperty(item) ? accum[item] : undefined, obj)  
+
+  }
 }

03-objects-arrays-intro-to-testing/2-invert-object/index.js

@@ -4,5 +4,9 @@
  * @returns {object | undefined} - returns new object or undefined if nothing did't pass
  */
 export function invertObj(obj) {
+  if (obj === undefined)
+    return;
 
+  const arr = Object.entries(obj);
+  return Object.fromEntries(arr.map(([keys,values])=>[values,keys]));
 }

03-objects-arrays-intro-to-testing/3-trim-symbols/index.js

@@ -5,5 +5,20 @@
  * @returns {string} - the new string without extra symbols according passed size
  */
 export function trimSymbols(string, size) {
+  if (string==='' || size === 0)  return '';
+  if (size === undefined) return string;
 
+  let newStr = '';
+  let n = 1;
+  for (let i = 0; i < string.length; i++) {  
+    if (string[i] === string[i-1]) {      
+      n++;              
+    } 
+    else n = 1;
+
+    if (n <= size) {
+      newStr = newStr + string[i];  
+    }         
+  }
+  return newStr;
 }

03-objects-arrays-intro-to-testing/4-uniq/index.js

@@ -4,5 +4,5 @@
  * @returns {*[]} - the new array with uniq values
  */
 export function uniq(arr) {
-
+  return Array.from(new Set(arr));
 }