Define map_values

builtin.c

@@ -950,6 +950,7 @@ static block bind_bytecoded_builtins(block b) {
 static const char* const jq_builtins[] = {
   "def break: error(\"break\");",
   "def map(f): [.[] | f];",
+  "def map_values(f): .[] |= f;",
   "def select(f): if f then . else empty end;",
   "def sort_by(f): _sort_by_impl(map([f]));",
   "def group_by(f): _group_by_impl(map([f]));",