ch3/

If the function `f` returns a non-finite `float64` value, the SVG file will contain invalid `<polygon>` elements (although many SVG renderers handle this gracefully).

Write a non-recursive version of `comma`, using `bytes.Buffer` instead of string concatenation.

Enhance `comma` so it deals correctly with floating-point numbers and an optional sign.

Write a function that reports whether two strings are anagrams of each other, that is, they contain the same letters in a different order.

Write const declarations for KB, MB, up through YB as compactly as you can.

Experiment with vizualizations of other functions from the `math` package.

Color each polygon based on its height, so that the peaks are colored red (`#ff0000`) and the valleys blue ('#0000ff').

Following the approach of the Lissajous example in Section 1.7, construct a web server that computes surfaces and writes SVG data to the client.

Implement a full-color Mandelbrot set using the function `image.NewRBA` and the type `color.RGBA` or `color.YCbCr`.

Supersampling is a technique to reduce the effect of pixelation by computing the color value at several points within each pixel and taking the average.

Another simple fractal uses Newton's method to find complex solutions to a function such as `z^4-1 = 0`.

Rendering fractals at high zoom levels demands great arithmetic precision.

Write a web server that renders fractals and writes the image data to the client.