util.iterators: Add skip() to skip the first n items of an iterator

1 files changed, 9 insertions, 0 deletions

diff --git a/util/iterators.lua b/util/iterators.lua
index 318c1a96..cc504827 100644
--- a/util/iterators.lua
+++ b/util/iterators.lua
@@ -90,6 +90,15 @@ function head(n, f, s, var)
 	end, s;
 end
 
+-- Skip the first n items an iterator returns
+function skip(n, f, s, var)
+	for i=1,n do
+		var = f(s, var);
+	end
+	return f, s, var;
+end
+
+-- Return the last n items an iterator returns
 function tail(n, f, s, var)
 	local results, count = {}, 0;
 	while true do