Class: Cumo::NArray::Step

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
ext/cumo/narray/step.c

Instance Method Summary collapse

Constructor Details

#new(start, end) ⇒ Object #new(range, step = nil, length = nil) ⇒ Object

Constructs a step using three parameters among start, end, step and length. start, end parameters can be replaced with range. If the step is omitted (or supplied with nil), then calculated from length or definded as 1.



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# File 'ext/cumo/narray/step.c', line 92

static VALUE
step_initialize( int argc, VALUE *argv, VALUE self )
{
    VALUE a, b=Qnil, c=Qnil, d=Qnil, e=Qnil;

    rb_scan_args(argc, argv, "13", &a, &b, &c, &d);
    /* Selfs are immutable, so that they should be initialized only once. */
    if (rb_ivar_defined(self, cumo_id_beg)) {
        rb_name_error(rb_intern("initialize"), "`initialize' called twice");
    }
    if (rb_obj_is_kind_of(a,rb_cRange)) {
        if (argc>3) {
            rb_raise(rb_eArgError, "extra argument");
        }
        d = c;
        c = b;
        e = rb_funcall(a, rb_intern("exclude_end?"), 0);
        //b = rb_ivar_get(a, cumo_id_end);
        b = rb_funcall(a, cumo_id_end, 0);
        //a = rb_ivar_get(a, cumo_id_beg);
        a = rb_funcall(a, cumo_id_beg, 0);
    }
    step_init(self, a, b, c, d, e);
    return Qnil;
}

Instance Method Details

#begin ⇒ Object #first ⇒ Object

Returns the start of step.

Overloads:

  • #begin ⇒ Object

    Returns:

    • (Object)
  • #first ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 126

static VALUE
step_first( VALUE self )
{
    return rb_ivar_get(self, cumo_id_beg);
}

#end ⇒ Object #last ⇒ Object

Returns the object that defines the end of step.

Overloads:

  • #end ⇒ Object

    Returns:

    • (Object)
  • #last ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 140

static VALUE
step_last( VALUE self )
{
    return rb_ivar_get(self, cumo_id_end);
}

#exclude_end? ⇒ Boolean

Returns true if step excludes its end value.

Returns:

  • (Boolean) 


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# File 'ext/cumo/narray/step.c', line 179

static VALUE
step_exclude_end_p(VALUE self)
{
    return RTEST(rb_ivar_get(self, cumo_id_excl)) ? Qtrue : Qfalse;
}

#begin ⇒ Object #first ⇒ Object

Returns the start of step.

Overloads:

  • #begin ⇒ Object

    Returns:

    • (Object)
  • #first ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 126

static VALUE
step_first( VALUE self )
{
    return rb_ivar_get(self, cumo_id_beg);
}

#end ⇒ Object #last ⇒ Object

Returns the object that defines the end of step.

Overloads:

  • #end ⇒ Object

    Returns:

    • (Object)
  • #last ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 140

static VALUE
step_last( VALUE self )
{
    return rb_ivar_get(self, cumo_id_end);
}

#length ⇒ Object #size ⇒ Object

Returns the length of step.

Overloads:

  • #length ⇒ Object

    Returns:

    • (Object)
  • #size ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 154

static VALUE
step_length( VALUE self )
{
    return rb_ivar_get(self, cumo_id_len);
}

#length ⇒ Object #size ⇒ Object

Returns the length of step.

Overloads:

  • #length ⇒ Object

    Returns:

    • (Object)
  • #size ⇒ Object

    Returns:

    • (Object) 


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# File 'ext/cumo/narray/step.c', line 154

static VALUE
step_length( VALUE self )
{
    return rb_ivar_get(self, cumo_id_len);
}

#step ⇒ Object

Returns the step of step.

Returns:

  • (Object) 


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# File 'ext/cumo/narray/step.c', line 167

static VALUE
step_step( VALUE self )
{
    return rb_ivar_get(self, cumo_id_step);
}