29 lines
550 B
CoffeeScript
29 lines
550 B
CoffeeScript
pascal = (n) ->
|
|
width = 6
|
|
for r in [1..n]
|
|
s = ws (width/2) * (n-r) # center row
|
|
output = (n) -> s += pad width, n
|
|
cell = 1
|
|
output cell
|
|
# Compute binomial coefficients as you go
|
|
# across the row.
|
|
for c in [1...r]
|
|
cell *= (r-c) / c
|
|
output cell
|
|
console.log s
|
|
|
|
ws = (n) ->
|
|
s = ''
|
|
s += ' ' for i in [0...n]
|
|
s
|
|
|
|
pad = (cnt, n) ->
|
|
s = n.toString()
|
|
# There is probably a better way to do this.
|
|
cnt -= s.length
|
|
right = Math.floor(cnt / 2)
|
|
left = cnt - right
|
|
ws(left) + s + ws(right)
|
|
|
|
pascal(7)
|