In Go programming, we often need to read data from JSON files. Today, we’ll talk about a simple way to do this without getting too technical.
Here’s a function that reads a JSON file:
// This function reads a JSON file and returns its contents.
func ReadJsonFileWithoutTypes() map[string]interface{} { // First, we try to open the JSON file. jsonFile, err := os.Open("./data/todos.json") if err != nil { fmt.Println("Oops! There was a problem opening the file: ", err) return nil } fmt.Println("Yay! The file is open and ready to use.") // We make sure to close the file when we're done. defer jsonFile.Close() // Next, we read the file's content into a special box called a 'byte slice'. byteValue, err := io.ReadAll(jsonFile) if err != nil { fmt.Println("Oops! There was a problem reading the file: ", err) return nil } // Now, we create a container to hold the data from the file. var results map[string]interface{} // We put the data from the file into our container. json.Unmarshal([]byte(byteValue), &results) return results
}
Let’s Understand the Function
This function, called ReadJsonFileWithoutTypes, helps us read a JSON file and see what’s inside. Here’s what it does:
Opening the File: First, we try to open the JSON file. If something goes wrong, we show an error message.
Reading the File: If we manage to open the file, we read its contents and put them in a ‘byte slice’. It’s like a box where we keep the data from the file.
Understanding the Data: Then, we take the data from the ‘byte slice’ and put it into a special container called a ‘map’. This container helps us understand the data better.
Finishing Up: Finally, we return the container with all the data from the JSON file.
That’s It!
This function is like a helper that makes it easy for us to read JSON files in our Go programs. We can use it whenever we need to see what’s inside a JSON file without worrying too much about complicated stuff.
Now, you can use this function to explore JSON files in your own Go projects! Have fun coding!