Add foreach and limit

tests/all.test

@@ -226,6 +226,14 @@ null
 1
 [1,2,4,8,16,32,64]
 
+[foreach .[] as $item ([3, null]; if .[0] < 1 then empty else [.[0] -1, $item] end; .[1])]
+[11,22,33,44,55,66,77,88,99]
+[11,22,33]
+
+[limit(3; .[])]
+[11,22,33,44,55,66,77,88,99]
+[11,22,33]
+
 #
 # Slices
 #