method

prev_year

v2_6_3 - Show latest stable - Class: Date

prev_year(p1 = v1)

public

This method is equivalent to d << (n * 12).

Date.new(2001,2,3).prev_year      #=> #<Date: 2000-02-03 ...>
Date.new(2008,2,29).prev_year     #=> #<Date: 2007-02-28 ...>
Date.new(2008,2,29).prev_year(4)  #=> #<Date: 2004-02-29 ...>

See also Date#<<.

static VALUE
d_lite_prev_year(int argc, VALUE *argv, VALUE self)
{
    VALUE n;

    rb_scan_args(argc, argv, "01", &n);
    if (argc < 1)
        n = INT2FIX(1);
    return d_lite_lshift(self, f_mul(n, INT2FIX(12)));
}

prev_year

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