dd_04_io

dd_04_file_io - JSON and YAML persistence

this example demonstrates dd file I/O operations: direct JSON and YAML file binding/unbinding using dd.BindFromJSON(), dd.BindFromYAML(), dd.UnbindToJSON(), and dd.UnbindToYAML() functions.

key concepts demonstrated

direct file operations

• BindFromJSON/YAML: read configuration directly from files
• UnbindToJSON/YAML: save configuration state to files
• error handling: comprehensive file and parsing error reporting
• round-trip compatibility: maintain data integrity through file operations

configuration management patterns

• config file loading: typical application startup pattern
• config file generation: create templates and save runtime state
• format flexibility: seamlessly work with both JSON and YAML
• file system integration: robust file I/O with proper error handling

workflow demonstrated

1. config loading: read configuration from JSON and YAML files
2. data manipulation: modify configuration in memory
3. config persistence: save modified configuration back to files
4. format conversion: convert between JSON and YAML formats
5. error handling: demonstrate file access and parsing error scenarios

file structure

the example creates and works with these files:

config.json     - JSON configuration file
config.yaml     - YAML configuration file  
output.json     - generated JSON output
output.yaml     - generated YAML output

usage

go run main.go

this will:

1. create sample config files in JSON and YAML formats
2. load configuration using file I/O functions
3. modify configuration data
4. save results to output files
5. demonstrate error handling

benefits

• simplified config loading: no need to handle file reading and JSON/YAML parsing separately
• consistent error handling: unified error types for file and parsing errors
• format agnostic: same struct definitions work with both JSON and YAML
• development workflow: easy config file generation and modification
• production ready: robust error handling and file operations