README.md updated: log updated.

README.md

@@ -1,15 +1,16 @@
-
 ![](media/logo_med.png)
 
 # Preludio
 
 ### A PRQL based data transformation language
+
 Preludio is a data transformation language based on PRQL. It is a language that allows you to transform and
 manipulate data in a simple and intuitive way, batteries included.
 
 No libraries or external dependencies are required to run the language.
 
 ### Example
+
 This is a simple example of what you can already do with Preludio.
 It reads a CSV file, derives two new columns, selects some columns and writes the result to a new CSV file.
 
@@ -18,6 +19,7 @@ let clean = (
   readCSV "test_files\\Cars.csv" delimiter: ";" header:true
   strReplace [MPG, Displacement, Horsepower, Acceleration] old:"," new:"."
   asFloat [MPG, Displacement, Horsepower, Acceleration]
+  orderBy [-Origin, Cylinders, -MPG]
 )
 
 let europe5Cylinders = (
@@ -41,25 +43,29 @@ let europe5Cylinders = (
 ![](media/repl_example.gif)
 
 ### Features
--  [x] Arithmetic and logical operators
--  [x] Read and write CSV files
--  [x] Derive new columns
--  [x] Select columns
--  [x] Filter rows
--  [ ] Sort rows
--  [ ] Group by and aggregate
--  [ ] Join tables
+
+- [x] Arithmetic and logical operators
+- [x] Read and write CSV files
+- [x] Derive new columns
+- [x] Select columns
+- [x] Filter rows
+- [x] Sort rows
+- [ ] Group by and aggregate
+- [ ] Join tables
 
 ### Installation
+
 To run it, you need to have [Go](https://golang.org/doc/install) installed.
 Once you have Go, you can clone this repository.
 
 To run the program, you can use the following command:
+
 ```bash
 go run .
 ```
 
 ### Future Features
+
 - [x] Move to [Gandalff](https://github.com/caerbannogwhite/preludio/tree/main/core/gandalff) library
 - [ ] Add statistical functions
 - [ ] Add support for Excel files
@@ -80,19 +86,23 @@ In case the language becomes quite successful, I will consider adding:
 - [ ] Integration with OpenAI (https://openai.com/blog/openai-api/), ie. image to table
 
 ### Contributing
+
 If you want to contribute to this project, you can do so by forking the repository and submitting a pull request.
 
 ### Developers
+
 If the grammar is changed, the parser must be regenerated. To do this, run the following command:
 
 (on Windows)
+
 ```
 make.ps1
 ```
 
 ### Log
- - **02 / 08 / 2023** Preludio is now using the Gandalff library for managing data.
- - **21 / 03 / 2023** First publishing of the repository. Many things are still not working.
- - **18 / 03 / 2023** Gandalff library: fist commit.
- - **20 / 08 / 2022** Preludio: fist commit.
-
+
+- **20 / 08 / 2023** After exactly one year from the first commit, Preludio is fairly stable and usable. The language is still missing a few core features (like `join` and aggregators, already supported by Gandalff), but it is already possible to perform many operations with it.
+- **02 / 08 / 2023** Preludio is now using the Gandalff library for managing data.
+- **21 / 03 / 2023** First publishing of the repository. Many things are still not working.
+- **18 / 03 / 2023** Gandalff library: fist commit.
+- **20 / 08 / 2022** Preludio: fist commit.