79754147

Date: 2025-09-03 05:10:41
Score: 2.5
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Does this solve your problem?

    dt[J(dates), on = 'date'][order(date), value := fcoalesce(value, shift(value))]

    #          date value
    #         <Date> <num>
    # 1: 2000-01-01     1
    # 2: 2000-02-01     2
    # 3: 2000-03-01     2
    # 4: 2000-04-01    NA
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Posted by: B. Christian Kamgang