instance method

Date#step

(::Date limit, ?::Integer step) { (::Date) -> untyped } -> ::Date

(::Date limit, ?::Integer step) -> ::Enumerator[::Date, ::Date]

step(limit, step = 1){|date| ... } → self

static VALUE
d_lite_step(int argc, VALUE *argv, VALUE self)
{
    VALUE limit, step, date;
    int c;

    rb_scan_args(argc, argv, "11", &limit, &step);

    if (argc < 2)
        step = INT2FIX(1);

#if 0
    if (f_zero_p(step))
        rb_raise(rb_eArgError, "step can't be 0");
#endif

    RETURN_ENUMERATOR(self, argc, argv);

    date = self;
    c = f_cmp(step, INT2FIX(0));
    if (c < 0) {
        while (FIX2INT(d_lite_cmp(date, limit)) >= 0) {
            rb_yield(date);
            date = d_lite_plus(date, step);
        }
    }
    else if (c == 0) {
        while (1)
            rb_yield(date);
    }
    else /* if (c > 0) */ {
        while (FIX2INT(d_lite_cmp(date, limit)) <= 0) {
            rb_yield(date);
            date = d_lite_plus(date, step);
        }
    }
    return self;
}

Calls the block with specified dates; returns self.

The first date is self.
Each successive date is date + step, where step is the numeric step size in days.
The last date is the last one that is before or equal to limit, which should be a Date object.

Example:

Example

limit = Date.new(2001, 12, 31)
Date.new(2001).step(limit){|date| p date.to_s if date.mday == 31 }

Output:

Example

"2001-01-31"
"2001-03-31"
"2001-05-31"
"2001-07-31"
"2001-08-31"
"2001-10-31"
"2001-12-31"

Returns an Enumerator if no block is given.

See also #start #strftime #saturday? #succ also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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