I am working on an nodejs app which reads data from a json file. Now I want to edit this json file in js (write to it). How do I do this ?
Here is my js code: `
var fs = require("fs")
//function for file input
function getFile(filename) {
var data = fs.readFileSync(filename,"ascii")
return data }
//parsing json
var jsonString = [getFile("File.json")]
var jsonObj = JSON.parse(jsonString)`
Modify the jsonObj as you want, create a new object or whatever, then write the file:
fs.writeFileSync("File.json", jsonData);
This will overwrite the file if it exists, so that way you edit the file.
You can load a json file by requiring it.
var contents = require('/path/to/file.json');
Iterate contents just like a regular object.
A JSON object, when parsed is, like any other JS object. Use object dot notation to access any data you want.
For example a value:
console.log(isonObi.something.value)
For example a value in an array:
console.log(isonObi.something[0].value)
From eyp
Modify the jsonObj as you want, create a new object or whatever, then write the file:
fs.writeFileSync("File.json", jsonData);This will overwrite the file if it exists, so that way you edit the file.
With nodeJS, you can require a JSON file.
Supposing you get this JSON file :
//test.json
[
{
"name": "toto",
"code": "4"
},
{
"name": "test",
"code": "5"
}
];
Then, you can require this file and perform some modification :
var json = require('./test.json');
json.forEach(function(elm){
elm.name = 'test';
});
