Change and renumber examples

Author: tshemsedinov

JavaScript/1-for.js

@@ -1,5 +1,25 @@
 'use strict';
 
-for (let i = 0; i < 10; i++) {
+console.log('Example 1');
+
+for (let i = 0; i < 3; i++) {
   console.log(i);
 }
+
+console.log('Example 2');
+
+{
+  let i = 0;
+  for (; i < 3; i++) {
+    console.log(i);
+  }
+}
+
+console.log('Example 3');
+
+{
+  let i = 0;
+  for (; i < 3;) {
+    console.log(i++);
+  }
+}

JavaScript/4-for-in-obj.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const hash = {
+  first: 7,
+  second: 10,
+  third: 1,
+  fourth: 5
+};
+
+hash.fifth = 2;
+
+for (const key in hash) {
+  const value = hash[key];
+  console.log(
+    key, '\t', typeof(key), '\t',
+    value, '\t', typeof(value)
+  );
+}

JavaScript/4-for-in.js JavaScript/5-for-in-array.jsJavaScript/4-for-in.js renamed to JavaScript/5-for-in-array.js

@@ -10,9 +10,3 @@ for (const i in numbers) {
   const value = numbers[i];
   console.log(i, typeof(i), value);
 }
-
-let j, value;
-for (j in numbers) {
-  value = numbers[j];
-  console.log(j, value);
-}

JavaScript/5-for-of.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const numbers = [7, 10, 1, 5, 2];
+numbers.field2 = 'Value2';
+numbers[-10] = 'Value3';
+numbers.field1 = 'Value1';
+numbers[5] = 20;
+
+for (const i of numbers) {
+  const value = numbers[i];
+  console.log(i, typeof(i), value);
+}

JavaScript/6-break.js

@@ -0,0 +1,14 @@
+'use strict';
+
+const flag = false;
+
+label1: {
+  console.log(1);
+  label2: {
+    console.log(2);
+    break label1;
+    console.log(3);
+  }
+  console.log(4);
+}
+console.log(5);

JavaScript/6-for-of.js

@@ -1,7 +1,6 @@
 'use strict';
 
 let i = 0;
-
 while (i < 10) {
   i++;
   console.log('Hello');

JavaScript/7-break.js

@@ -16,6 +16,7 @@ const res1 = [7, 10, 1, 5, 2]
   .filter(x => x > 4)
   .map(f3)
   .reduce((acc, val) => acc + val);
+
 console.log(res1);
 
 [7, 10, 1, 5, 2]