UTIL: Add a set utility function for turning ipairs() tables into sets

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/gitano/util.lua b/lib/gitano/util.lua
index cfab64d..b0ca710 100644
--- a/lib/gitano/util.lua
+++ b/lib/gitano/util.lua
@@ -249,6 +249,15 @@ local function process_expansion(tags, expn, tagsactive)
    return tconcat(r)
 end
 
+local function set(t)
+   local ret = {}
+   for i, v in ipairs(t) do
+      ret[i] = v
+      ret[v] = i
+   end
+   return ret
+end
+
 return {
    parse_cmdline = _parse_cmdline,
 
@@ -266,4 +275,6 @@ return {
 
    prep_expansion = prep_expansion,
    process_expansion = process_expansion,
+
+   set = set,
 }