A-M baby

Task/Happy-numbers/CoffeeScript/happy-numbers.coffee

@@ -0,0 +1,22 @@
+happy = (n) ->
+  seen = {}
+  while true
+    n = sum_digit_squares(n)
+    return true if n == 1
+    return false if seen[n]
+    seen[n] = true
+
+sum_digit_squares = (n) ->
+  sum = 0
+  for c in n.toString()
+    d = parseInt(c)
+    sum += d*d
+  sum
+
+i = 1
+cnt = 0
+while cnt < 8
+  if happy(i)
+    console.log i
+    cnt += 1
+  i += 1