Method: Date#step

Defined in:
date_core.c

#step(limit[, step = 1]) ⇒ Object #step(limit[, step = 1]) {|date| ... } ⇒ self

Iterates evaluation of the given block, which takes a date object. The limit should be a date object.

For example:

Date.new(2001).step(Date.new(2001,-1,-1)).select{|d| d.sunday?}.size

#=> 52

Overloads:

  • #step(limit[, step = 1]) {|date| ... } ⇒ self

    Yields:

    • (date)

    Returns:

    • (self)

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# File 'date_core.c', line 6194

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

    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;
    switch (FIX2INT(f_cmp(step, INT2FIX(0)))) {
      case -1:
	while (FIX2INT(d_lite_cmp(date, limit)) >= 0) {
	    rb_yield(date);
	    date = d_lite_plus(date, step);
	}
	break;
      case 0:
	while (1)
	    rb_yield(date);
	break;
      case 1:
	while (FIX2INT(d_lite_cmp(date, limit)) <= 0) {
	    rb_yield(date);
	    date = d_lite_plus(date, step);
	}
	break;
      default:
	abort();
    }
    return self;
}