walk/1

builtin.c

@@ -1640,7 +1640,18 @@ static const char* const jq_builtins[] = {
   "      else .[2]"
   "      end"
   "  end;",
+
+  // # Apply f to composite entities recursively, and to atoms
+  "def walk(f):"
+  "  . as $in"
+  "  | if type == \"object\" then"
+  "      reduce keys[] as $key"
+  "        ( {}; . + { ($key):  ($in[$key] | walk(f)) } ) | f"
+  "  elif type == \"array\" then map( walk(f) ) | f"
+  "  else f"
+  "  end;",
 };
+
 #undef LIBM_DDD_NO
 #undef LIBM_DD_NO
 #undef LIBM_DDD