Description

Implement frequencies_as_map which returns a map of frequencies of the items in the collection. The result is in the form {value: count}, where value is always a string. For example, frequencies_as_map([1,3,5,7,9,9]) returns:

{
  1: 1,
  3: 1,
  5: 1,
  7: 1,
  9: 2
}

Pull request type

• Bugfix
• Algorithm/Module
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

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Reviewer checklist (the reviewer checks this part)

Module/Algorithm

• Core algorithm/module implementation
• Query module implementation
• Tests provided (unit / e2e)
• Code documentation
• README short description

Documentation checklist

• Add the documentation label tag
• Add the bug / feature label tag
• Add the milestone for which this feature is intended
  • If not known, set for a later milestone
• Write a release note, including added/changed clauses
  • Added collections.frequencies_as_map function to count element occurrences in a list.
• Link the documentation PR here
  • Add frequencies_as_map docs documentation#1461