mod_adhoc: Add support for commands only executable by global administrators

[prosody.git] / util / iterators.lua

diff --git a/util/iterators.lua b/util/iterators.lua
index 318c1a96b8fad3b45f1d7111ef130d98ab34e8f0..dc692d64eac36e93a14b07c38488b56de10c5d44 100644 (file)
--- a/util/iterators.lua
+++ b/util/iterators.lua
@@ -73,7 +73,7 @@ function count(f, s, var)
                var = ret[1];
                if var == nil then break; end
                x = x + 1;
-       end     
+       end
        
        return x;
 end
@@ -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
@@ -122,7 +131,7 @@ function it2array(f, s, var)
        return t;
 end
 
--- Treat the return of an iterator as key,value pairs, 
+-- Treat the return of an iterator as key,value pairs,
 -- and build a table
 function it2table(f, s, var)
        local t, var = {};