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Ruby Ruby Core and Standard Library Ruby Standard Library: Part 1 The Ruby Date Class

Nick Vitsinsky
Nick Vitsinsky
7,246 Points
Posted by Nick Vitsinsky
Nick Vitsinsky
7,246 Points

Unexpected return when changing format for return Date in irb

I assumed that it doesn't matter what date format I'll try to use as long as it would be valid and and have tried to return the date in a format %d/%m/%Y for

Date.strptime("19/10/1985", "%d/%m/%Y")

the output is

=> #<Date: 1985-10-19 ((2446358j,0s,0n),+0s,2299161j)>

expected return is

=> #<Date: 1985-19-10....

when I try to return the same result for 1/10/1985, I've got expected result

Date.strptime("19/10/1985", "%d/%m/%Y")                                                       
=> #<Date: 1985-10-19 ((2446358j,0s,0n),+0s,2299161j)>

So what is the problem?

1 Answer

Todd MacIntyre
Todd MacIntyre
12,248 Points
Todd MacIntyre
Todd MacIntyre
12,248 Points

That output is correct. You are expecting the incorrect output to be displayed.

Date.strptime("19/10/1985", "%d/%m/%Y")

You have Year = 1985. Month = 10. Day = 19. Ruby output is displayed in YEAR/MONTH/DAY by default, thus giving 1985-10-19