Preprocess Dates

On a web form, users are asked to enter dates which come in as strings. Before storing them to the database, they need to be converted to a standard safe format. Write a function to convert the dates as described. Given a date string in the format Day Month Year, where:

• • Day is a string in the form "1st", "2nd", "3rd", "21st", "22nd", "23rd", "31st" and all other are the number + "th", eg: "4th" or "12th".
• Month is the first three letters of the English language months, like "jan" for January through "Dec" for December.
• Year is 4 digits ranging from 1900 to 2100. Convert the date string "Day Month Year" to the date string "YYYY-MM-DD" in the format "4 digit year - 2 digit month - 2 digit day". Function Description Complete the function preprocessDate. preprocessDate has the following parameter(s):
• string dates[n]: an array of date strings in the format Day Month Year Returns string[n]: array of converted date strings

Constraints

• the values of Day, Month, Year are restricted to the value ranges specified above.
• The given

Example 1

Input:

dates = ["1st Mar 1974", "22nd Jan 2013", "7th Apr 1904"]

Output:

["1974-03-01", "2013-01-22", "1904-04-07"]

Explanation:

• 1st Mar 1974 is converted to 1974-03-01.
• 22nd Jan 2013 is converted to 2013-01-22.
• 7th Apr 1904 is converted to 1904-04-07.