Parse Year Ranges Into Sorted Unique Years | Dataford Interview Questions

Parse a string of comma-delimited years and year ranges, and return an array of all individual years included with duplicates removed and sorted.

Implement parse_years(years) where years is a string containing individual four-digit years or inclusive ranges such as "2018-2020". Tokens may contain surrounding whitespace. Return a list of integers in ascending order. Inputs contain valid tokens, and range endpoints are ordered from lowest to highest.

Constraints

The input is a string of comma-delimited valid year tokens.
Each token is either a four-digit year or an inclusive range in the form start-end.
Range endpoints satisfy start <= end.
Tokens may contain surrounding whitespace.
The input may be empty or contain empty whitespace.

Function Signature

def parse_years(years):

Your question is Parse Year Ranges Into Sorted Unique Years. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Parse a string of comma-delimited years and year ranges, and return an array of all individual years included with duplicates removed and sorted.

Constraints

The input is a string of comma-delimited valid year tokens.
Each token is either a four-digit year or an inclusive range in the form start-end.
Range endpoints satisfy start <= end.
Tokens may contain surrounding whitespace.
The input may be empty or contain empty whitespace.

Function Signature

def parse_years(years):

Your question is Parse Year Ranges Into Sorted Unique Years. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.