String Compression
Compress a string using the counts of repeated characters.
Function Signature
function compressString(chars);
Example 1:
Input:
chars = ["a","a","b","b","c","c","c"]
Output:["a","2","b","2","c","3"]
Explanation: The string compression of "aabbbccc" is "a2b2c3".
Example 2:
Input:
chars = ["a","b","c"]
Output:["a","b","c"]
Explanation: The string compression of "abc" is "abc" as each character appears only once.
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String