Example 1:
Input: name = "my_counter"
Output: "myCounter"
Explanation:
Example 2:
Input: name = "__user_account_id__"
Output: "__userAccountId__"
Explanation:
Example 3:
Input: name = "already"
Output: "already"
Explanation:
A coworker submitted code with variable names written in snake_case, where multiword names are separated by underscores. Your company convention is lowerCamelCase, where multiword names are concatenated and the first letter of every word except the first is capitalized.
Given one variable name name, convert the word-separating underscores in its core name to lowerCamelCase.
Variable names may start with one or more underscores. These leading underscores must be preserved.
Variable names may end with one or more underscores. These trailing underscores must also be preserved.
If multiple underscores appear between words, treat them as a single separator.
Return the converted variable name.
The separator is removed and "counter" is capitalized because it is not the first word.
The two leading and two trailing underscores are preserved, while the middle words become lower camel case.
A single-word name has no separators to convert.
1 <= name.length <= 10^5name consists only of lowercase English letters and underscores.