Method Chaining
Lawrence D’Oliveiro
lawrencedo99 at gmail.com
Fri Jun 17 00:37:00 EDT 2016
On Friday, June 17, 2016 at 4:24:24 PM UTC+12, Michael Selik wrote:
> On Thu, Jun 16, 2016 at 10:53 PM Lawrence D’Oliveiro wrote:
>
> > Example from <http://default-cube.deviantart.com/art/Truchet-612095093>,
> > concisely expressing a complex drawing sequence:
> >
> > (g
> > .move_to((p1 + p2a) / 2)
> > .line_to(p1 + (p2 - p1) * frac)
> > .line_to((p1 + p1a) / 2)
> > .stroke()
> > .move_to((p2 + p2a) / 2)
> > .line_to(p2 + (p1 - p2) * frac)
> > .line_to((p2 + p1a) / 2)
> > .stroke()
> > )
>
> Wouldn't that look nicer with the ``g`` repeated on every line, no extra
> indentation, and no extraneous parentheses?
>
> g.move_to((p1 + p2a) / 2)
> g.line_to(p1 + (p2 - p1) * frac)
> g.line_to((p1 + p1a) / 2)
> g.stroke()
> g.move_to((p2 + p2a) / 2)
> g.line_to(p2 + (p1 - p2) * frac)
> g.line_to((p2 + p1a) / 2)
> g.stroke()
Clearly, no.
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