Combining multiple JSON strings into a single object using JavaScript

Question

Combining multiple JSON strings into a single object using JavaScript

I am facing an issue with parsing a JSON output that contains two strings with specific formats:

   [{"device_id":"9700015","update_time":"2017-01-04 18:30:00","sensor_value":"1287.6"}]
   [{"device_id":"9700016","update_time":"2016-12-31 18:30:00","sensor_value":"1113.8"}]

My goal is to combine these strings into one object. I tried using JSON.parse(data), but it only gives me the first string as an object, not both. How can I resolve this issue?

The desired output should look like this:

   [{"device_id":"9700015","update_time":"2017-01-04 18:30:00","sensor_value":"1287.6"},
   {"device_id":"9700016","update_time":"2016-12-31 18:30:00","sensor_value":"1113.8"}]

javascript arrays json

Answer 1

Answer №1

In order to achieve the desired output, it seems necessary to have an array containing both objects. If this is not the case, please clarify your expectations.

If you find it challenging to adjust the received JSON string to resemble a proper array structure, one solution could be replacing '][' with a comma ',' in the string. This will enable you to parse the JSON and obtain an array with two objects as shown below:

original = '[{"device_id":"9700015","update_time":"2017-01-04 18:30:00","sensor_value":"1287.6"}][{"device_id":"9700016","update_time":"2016-12-31 18:30:00","sensor_value":"1113.8"}]';
replaced = original.replace('][', ',');
parsed = JSON.parse(replaced);

Update:

In scenarios where there is a line break between closing and opening square brackets, the substitution should be adjusted accordingly:

replaced = original.replace(']\n[', ',');

Additional note:

If the input contains multiple instances like these, utilizing a regular expression with the global flag can handle all occurrences effectively:

replaced = original.replace(/\]\[/g, ',');

This regular expression targets every instance of '][' using \]\[, with the global flag 'g' ensuring that all matches are replaced.

Answer 2

In order to achieve the desired output, it seems necessary to have an array containing both objects. If this is not the case, please clarify your expectations.

If you find it challenging to adjust the received JSON string to resemble a proper array structure, one solution could be replacing '][' with a comma ',' in the string. This will enable you to parse the JSON and obtain an array with two objects as shown below:

original = '[{"device_id":"9700015","update_time":"2017-01-04 18:30:00","sensor_value":"1287.6"}][{"device_id":"9700016","update_time":"2016-12-31 18:30:00","sensor_value":"1113.8"}]';
replaced = original.replace('][', ',');
parsed = JSON.parse(replaced);

Update:

In scenarios where there is a line break between closing and opening square brackets, the substitution should be adjusted accordingly:

replaced = original.replace(']\n[', ',');

Additional note:

If the input contains multiple instances like these, utilizing a regular expression with the global flag can handle all occurrences effectively:

replaced = original.replace(/\]\[/g, ',');

This regular expression targets every instance of '][' using \]\[, with the global flag 'g' ensuring that all matches are replaced.

Answer 3

Answer №2

Here is a handy way to combine two objects into one array:

var data1 = [{"id":"001","name":"Alice"},{"id":"002","name":"Bob"}];
var data2 = [{"id":"003","name":"Charlie"},{"id":"004","name":"David"}];
/* or */
var data1 = JSON.parse('[{"id":"001","name":"Alice"},{"id":"002","name":"Bob"}]');
var data2 = JSON.parse('[{"id":"003","name":"Charlie"},{"id":"004","name":"David"}]');

// merge both arrays
var mergedData = [].concat.apply([], [data1, data2]);
console.log(mergedData);
//  [{"id":"001","name":"Alice"}, {"id":"002","name":"Bob"}, {"id":"003","name":"Charlie"}, {"id":"004","name":"David"}]

Answer 4

Here is a handy way to combine two objects into one array:

var data1 = [{"id":"001","name":"Alice"},{"id":"002","name":"Bob"}];
var data2 = [{"id":"003","name":"Charlie"},{"id":"004","name":"David"}];
/* or */
var data1 = JSON.parse('[{"id":"001","name":"Alice"},{"id":"002","name":"Bob"}]');
var data2 = JSON.parse('[{"id":"003","name":"Charlie"},{"id":"004","name":"David"}]');

// merge both arrays
var mergedData = [].concat.apply([], [data1, data2]);
console.log(mergedData);
//  [{"id":"001","name":"Alice"}, {"id":"002","name":"Bob"}, {"id":"003","name":"Charlie"}, {"id":"004","name":"David"}]

Combining multiple JSON strings into a single object using JavaScript

Answer №1

Answer №2

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