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Problem Brief

Preprocess Dates

INTERNFULLTIMEOA

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

1Example 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.

    • Constraints

    Limits and guarantees your solution can rely on.

  • the values of Day, Month, Year are restricted to the value ranges specified above.
  • The given dates are guaranteed to be valid, so no error handling is necessary.
  • 1 <= n <= 104
    • public String[] preprocessDate(String[] dates) {
    // write your code here
}
    Input

    dates

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

    Output

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

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