Anyway, I'm kind of sad that people seem to want a straight copy of Ruby's blocks. I'd prefer syntax that allowed passing more than one block to a function, like the C-like syntax I proposed here: http://www.hackerdashery.com/2006/10/code-blocks-and-c-like-...
map(foo, pairs) where:
pairs = [(0,1), (20, 10), (30, 10)]
def foo(pair):
a = pair[1] * 2
b = pair[0] * a
return (b, a)
do:
<statements>
where:
<statements>