JavaScript Exercise - String

1. Write a JavaScript function to check whether a string is blank or not.
   
   
   
   Test Data :
   console.log(is_Blank(''));
   console.log(is_Blank('abc'));
   true
   false
   
   
2. Write a JavaScript function to split a string and convert it into an array of words.
   
   Test Data :
   console.log(string_to_array("Robin Singh"));
   ["Robin", "Singh"]
   
   
3. Write a JavaScript function to remove specified number of characters from a string.
   
   Test Data :
   console.log(truncate_string("Robin Singh",4));
   "Robi"
   
   
4. Write a JavaScript function to convert a string in abbreviated form.
   
   Test Data :
   console.log(abbrev_name("Robin Singh"));
   "Robin S."
   
5. Write a JavaScript function to hide email addresses to protect from unauthorized user. 
   
   Test Data :
   console.log(protect_email("robin_singh@example.com"));
   "robin...@example.com"
   
   
6. Write a JavaScript function to capitalize the first letter of a string.
   
   Test Data :
   console.log(capitalize('js string exercises'));
   "Js string exercises"