Finished of e2, two ruby methods

e2/e2.2.rb

@@ -0,0 +1,13 @@
+#!/usr/bin/ruby
+
+last = sum = 0
+current = 1
+while current < 4000000
+	if current % 2 == 0
+		sum += current
+	end
+	tmp = current
+	current += last
+	last = tmp
+end
+puts sum

e2/e2.lisp

@@ -0,0 +1,7 @@
+(defun e2 ()
+  (let ((sum 0))
+    (do ((last 0 current)
+	 (current 1 (+ current last)))
+	( (>= current 4000000) sum)
+      (if (= (rem current 2) 0)
+	  (incf sum current)))))

e2/e2.m

@@ -1 +1,12 @@
 #include <objc/Object.h>
+
+int main(int argc, char ** argv) {
+	int i, last, current, sum, tmp;
+	sum = 0;
+	last = 0;
+	for(current = 1; current < 4000000; tmp = current, current = last + current, last = tmp) {
+		if ( current % 2 == 0) 
+			sum += current;
+	}
+	printf("%d\n", sum);
+}

e2/e2.py

@@ -0,0 +1,11 @@
+#!/usr/bin/python
+
+last = sum = 0
+current = 1
+while (current < 4000000):
+	if current % 2 == 0:
+		sum += current
+	tmp = current
+	current += last
+	last = tmp
+print sum

e2/e2.rb

@@ -0,0 +1,16 @@
+#!/usr/bin/ruby
+
+def sum(last, current, sum)
+	if current >= 4000000
+		return sum
+	end
+	if current % 2 == 0
+		sum += current
+	end
+	tmp = current
+	current += last
+	last = tmp
+	sum(last, current, sum)
+end
+
+puts sum(0, 1, 0)