method

downto

v1_9_1_378 - Show latest stable - 0 notes - Class: Integer

1_8_6_287 (0)
1_8_7_72 (-10)
1_8_7_330 (0)
1_9_1_378 (-29)
1_9_2_180 (38)
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10 (-16)
2_2_9 (0)
2_4_6 (0)
2_5_5 (-3)
2_6_3 (0)
What's this?

downto(p1) public

Iterates block, passing decreasing values from int down to and including limit.

5.downto(1) { |n| print n, ".. " }
print "  Liftoff!\n"

produces:

5.. 4.. 3.. 2.. 1..   Liftoff!

Show source

static VALUE
int_downto(VALUE from, VALUE to)
{
    RETURN_ENUMERATOR(from, 1, &to);
    if (FIXNUM_P(from) && FIXNUM_P(to)) {
        long i, end;

        end = FIX2LONG(to);
        for (i=FIX2LONG(from); i >= end; i--) {
            rb_yield(LONG2FIX(i));
        }
    }
    else {
        VALUE i = from, c;

        while (!(c = rb_funcall(i, '<', 1, to))) {
            rb_yield(i);
            i = rb_funcall(i, '-', 1, INT2FIX(1));
        }
        if (NIL_P(c)) rb_cmperr(i, to);
    }
    return from;
}

downto

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