Timing functions in LiveScript

gistfile1.txt

polynomial = (coefficients) ->
    n = 0
    coefficients = reverse coefficients
    (x = n++) ->
        sum = 0
        for c, i in coefficients
            sum += c * Math.pow(x, i)
        sum

linear = (a = 1, b = 0) ->
    polynomial([a, b])

quadratic = (a = 1, b = 0, c = 0) ->
    polynomial([a, b, c])

sigmoid = (min = 0.5, max = 1, scale = 0.5, step = linear!) ->
    ->  (1 / (1 + Math.exp -step!) - (0.5 - min)) * 2 * max * scale

inc = quadratic 0.1

s = sigmoid 0, 2, 1000, inc

log = ""
for i from 0 to 20
    log += "#{i}:\t#{s!}\n"
log