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util.iterators: Add range(from, to)

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Matthew Wild 2011-09-25 00:20:43 +01:00
parent 3f7fda7079
commit 40a31d93d6
1 changed files with 7 additions and 0 deletions
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7
util/iterators.lua
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@ -120,6 +120,12 @@ function tail(n, f, s, var)
--return reverse(head(n, reverse(f, s, var)));
end
local function _range_iter(max, curr) if curr < max then return curr + 1; end end
function range(x, y)
if not y then x, y = 1, x; end -- Default to 1..x if y not given
return _range_iter, y, x-1;
end
-- Convert the values returned by an iterator to an array
function it2array(f, s, var)
local t, var = {};
@ -142,3 +148,4 @@ function it2table(f, s, var)
end
return t;
end