JavaScript Coding Questions

As a Front-End developer, JavaScript is the core skill of everything

97. compress a string JavaScript string easy
102. validate string of parentheses JavaScript Algorithm string easy
105. find the first duplicate character in a string JavaScript string easy
111. Count palindromic substrings JavaScript Algorithm string medium
112. remove duplicate characters in a string JavaScript Algorithm string medium
166. validate number string JavaScript Algorithm string medium
173. uncompress string JavaScript string algorithm medium