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.

Solution :

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