Determine character frequency in the given string
Problem description :
Create a character frequency analysis table for the given string.
Input : A string // "foo bar"
Output : A JSON // {" ": 1, a: 1, b: 1, f: 1, o: 2, r: 1}
Logic :
- Create a charFrequency hash table
- Iterate through string
- If the character exist in charFrequency hash table then update the frequency
- Else add the entry into the hash table and initialize its value to 1
- return charFrequency.