Update README.md

- add more usage examples

README.md

@@ -41,4 +41,50 @@ let mys_recipe_model = common::create_recipe_model_from_file(common::create_reci
 ...
 ```
 
-...WIP
+### Get list of material settings
+
+```rust
+// get current material settings including empty (0)
+let mut used_in_mys = mys_recipe_model.list_material_settings();
+used_in_mys.push("0".to_string());
+```
+
+### Get all recipe of expected material id
+
+```rust
+let aus_latest = common::create_recipe_model_from_file(common::create_recipe_path(
+    "aus",
+    *aus_version.unwrap(),
+));
+
+let prod_list = aus_latest.find_recipe_by_material_path_id("511214");
+```
+
+### Generate google sheet style table of recipe from file
+
+```rust
+// Experimental: expect current execution path to have `./test_result` folder first, and `config.RECIPE_DIR/{country}/{version_file_format}` must exist.
+import::generate_recipe_sheet_table("mys", 626);
+```
+
+### Notes
+
+
+Simple Snippet Patterns
+
+```rust
+// =============================================
+//  Get current material and convert to thai id
+// =============================================
+let curr_rpl_mat_id = rpl.materialPathId.as_i64().unwrap_or(0);
+
+// strip off first 2
+let pure_mat_id = if curr_rpl_mat_id > 300000 {
+    //
+    curr_rpl_mat_id.to_string()[2..]
+        .parse::<i64>()
+        .expect("not a number")
+} else {
+    curr_rpl_mat_id
+};
+```