fix(guide): Fix all frontmatter

guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch/index.md

@@ -1,4 +1,6 @@
-
+---
+title: Replacing If Else Chains with Switch
+---
 ## Replacing If Else Chains with Switch
 
 <!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
@@ -26,8 +28,8 @@ function chainToSwitch(val) {
         answer = "Ate Nine";
         break;
   }
-  // Only change code above this line  
-  return answer;  
+  // Only change code above this line
+  return answer;
 }
 // Change this value to test
 chainToSwitch(7);
@@ -36,9 +38,9 @@ chainToSwitch(7);
 We need to change the chained ```if/else if``` statements into a ```switch``` statement.
 
  Here’s a solution:
- 
+
  Now, we need to comment (```//``` - select all lines and ```ctrl+/```) all chained ```if/else if``` statements:
- 
+
  ```javascript
  //   if (val === "bob") {
 //     answer = "Marley";
@@ -52,16 +54,16 @@ We need to change the chained ```if/else if``` statements into a ```switch``` st
 //     answer = "Ate Nine";
 //   }
  ```
- 
+
  Next, we need to create simple ```switch``` statement:
- 
+
  ```javascript
  switch(val) {
- } 
+ }
  ```
- 
+
  and add in this ```switch``` statement ```case``` - for all ```if/else if``` statement (just copy it from our commented code above):
- 
+
   ```javascript
   switch(val) {
     case "bob":
@@ -80,13 +82,13 @@ We need to change the chained ```if/else if``` statements into a ```switch``` st
         answer = "Ate Nine";
         break;
   }
-  ``` 
- 
+  ```
+
  Dont forget to use ```break``` in each ```case```!
  Now, we can delete commented code with ```if/else if``` statement above.
- 
+
  Here’s a full solution:
- 
+
  ```javascript
  function chainToSwitch(val) {
   var answer = "";
@@ -107,9 +109,9 @@ We need to change the chained ```if/else if``` statements into a ```switch``` st
     case 7:
         answer = "Ate Nine";
         break;
-  } 
-  // Only change code above this line  
-  return answer;  
+  }
+  // Only change code above this line
+  return answer;
 }
 // Change this value to test
 chainToSwitch(7);

guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions/index.md

@@ -1,4 +1,6 @@
-
+---
+title: Return Early Pattern for Functions
+---
 ## Return Early Pattern for Functions
 
 <!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
@@ -9,7 +11,7 @@ Here’s a setup:
 // Setup
 function abTest(a, b) {
   // Only change code below this line
-  
+
   // Only change code above this line
   return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));
 }
@@ -27,7 +29,7 @@ We add in body of function simple ```if``` statement, which, under the condition
   }
 ```
 
-Now, if ```a``` or ```b``` are less than ```0``` - function exit with a value of ```undefined```, in other cases - 
+Now, if ```a``` or ```b``` are less than ```0``` - function exit with a value of ```undefined```, in other cases -
 
 ```javascript
  return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));
@@ -35,7 +37,7 @@ Now, if ```a``` or ```b``` are less than ```0``` - function exit with a value of
 ```
 
   Here’s a full solution:
-  
+
    ```javascript
    // Setup
 function abTest(a, b) {
@@ -43,7 +45,7 @@ function abTest(a, b) {
   if (a < 0 || b < 0) {
     return undefined;
   }
- 
+
   // Only change code above this line
 
   return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));