ujson

Methods to work with JSON objects and files.

Installation

Install ujson using NPM:

npm install ujson

API

ujson.parse(str)

Parses a JSON string and builds the JavaScript value or object described by the string.

ujson.toString(obj, [ space])

Converts a JavaScript object to a JSON string. Accepts the following arguments:

• obj: JavaScript object to converts to a string.
• space: string or number that's used to insert white space into the output JSON string for readability purposes.

ujson.read(path, [options, ] callback)

Reads the content of a JSON file. Accepts the following arguments:

• path: full path to the json file.
• options: (optionally) object or string with the following options:
  • encoding: default: utf8.
• callback: function that will be executed with two arguments: error and data, where data is a parsed object with the file content in JSON format, and error is an Error object (see https://nodejs.org/api/errors.html#errors_class_error) if there is an error reading the JSON file.

If options is a string, then it specifies the encoding. Example:

ujson.read('file.json', 'utf8', function(error, data)
{
  //Check for error
  if(error){ throw error; }

  //Show json content
  console.log(data);
});

ujson.readSync(path, [options])

Synchronous version of ujson.read. Returns a parsed object with the content of the json file.

ujson.write(path, object, [options, ] callback)

Write the object to the json file specified. Accepts the following arguments:

• path: string with the filename.
• object: json object that will be saved as a json file.
• options (optionally) object or string with the following options:
  • encoding: default: utf8.
  • space: string or number that's used to insert white space into the output JSON string for readability purposes.
• callback: function.

Example:

ujson.write('file.json', { key: 'value' }, { encoding: 'utf8', space: '\t' }, function(error)
{
  //Check for error
  if(err){ throw error; }

  //Do something....
});

ujson.writeSync(path, object, [options])

Synchronous version of ujson.write.

ujson.extend(child, parent, keys)

Extend a child object with the keys of a parent object. Example:

//Parent object
var obj_parent = { key1: 'value1', key2: 'value2', key3: 'value3' };

//Child object
var obj_child = { key4: 'value4' };

//Extend
var obj_extended = ujson.extend(obj_child, obj_parent, [ 'key1', 'key2' ]);

//Show  extended object
console.log(obj_extended); //-> { key4: 'value4', key1: 'value1', key2: 'value2' }

License

MIT LICENSE.