Coding: String Date Format Problem | Dataford Interview Questions

Given a string in the format 'MM-DD' where any number of 'M's or 'D's can be substituted with 'X', return the latest possible valid date within the calendar year; if invalid, return 'xx-xx'.

Implement latest_valid_date(date), which accepts and returns strings. The input must contain exactly five characters in MM-DD format, with digits or X in the month and day positions. Treat dates using the standard calendar, and return the result as MM-DD.

Constraints

The input is a string.
A valid-shaped input has exactly 5 characters.
The third character must be '-'.
Other positions contain digits or 'X'.
The output is either a valid MM-DD string or 'xx-xx'.
February is treated as having 28 days.

Function Signature

def latest_valid_date(date):

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Problem

Given a string in the format 'MM-DD' where any number of 'M's or 'D's can be substituted with 'X', return the latest possible valid date within the calendar year; if invalid, return 'xx-xx'.

Constraints

The input is a string.
A valid-shaped input has exactly 5 characters.
The third character must be '-'.
Other positions contain digits or 'X'.
The output is either a valid MM-DD string or 'xx-xx'.
February is treated as having 28 days.

Function Signature

def latest_valid_date(date):

Your question is Coding: String Date Format Problem. 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.