HowProgrammingWorks · 1tssayzy · Oct 25, 2024
diff --git a/.idea/.gitignore b/.idea/.gitignore
diff --git a/.idea/DataTypes.iml b/.idea/DataTypes.iml
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
diff --git a/.idea/codeStyles/codeStyleConfig.xml b/.idea/codeStyles/codeStyleConfig.xml
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/Exercises.ua.md b/Exercises.ua.md
@@ -1,4 +1,4 @@
-# Вправи
+x   # Вправи
 
 ## Скалярні типи та посилання
 

diff --git a/Exercises/1-hoisting.js b/Exercises/1-hoisting.js
diff --git a/Exercises/1-hoisting.test b/Exercises/1-hoisting.test
diff --git a/Exercises/2-by-value.js b/Exercises/2-by-value.js
@@ -1,5 +1,7 @@
 'use strict';
 
-const inc = null;
+
+const inc = (x) => ++x;
+
 
 module.exports = { inc };
diff --git a/Exercises/3-by-reference.js b/Exercises/3-by-reference.js
@@ -1,7 +1,11 @@
 'use strict';
 
+
+
 const inc = (obj) => {
-  console.log(obj);
+  if (typeof obj === 'object') {
+    obj.n++;
+  };
 };
 
 module.exports = { inc };
diff --git a/Exercises/4-count-types.js b/Exercises/4-count-types.js
@@ -1,5 +1,14 @@
 'use strict';
 
-const countTypesInArray = null;
+const countTypesInArray = (arr) => {
+  const typeCount = {};
+  for (const item of arr) {
+    const type = typeof item;
+    const Counter = typeCount[type] || 0;
+    typeCount[type] = Counter + 1;
+  }
+  return typeCount;
+};
+
 
 module.exports = { countTypesInArray };
diff --git a/Solutions/4-count-types.js b/Solutions/4-count-types.js
@@ -1,4 +1,4 @@
-'use strict';
+  'use strict';
 
 const countTypesInArray = (arr) => {
   const counters = {};