We Keep Coding

How to change format of data in Javascript?

I am working with some integrations. I get data in Javascript file and I need to change the format slightly.
The data is received by Javascript in the following format:
["{label=Created By ID, value=Contact_ID__r.CreatedById}",
"{label=Created Date, value=Contact_ID__r.CreatedDate}",
...]
I need to convert the data in the following format in order to pass it ahead:
[{"label":"Start Date","value":"Contract_Start_Date__c"},
{"label":"Created Date", "value":"Contact_ID__r.CreatedDate"},
...]
I tried using JSON.stringify() and .replace() in various combinations to change the format. Eg: data[i].replace(/"/g, ''). Nothing worked. I am not able to change the format.
Please help. Thank You!
More Info:
The data is received from apex(just like java) in the form of Map<Map<String,String>,String>.
Eg:["{label=Created By ID, value=Contact_ID__r.CreatedById}","account"}]
In javascript, I extracted Map<String,String> part of it as follows:
//result.data contains the data returned by apex method.
//Variable availableOptionsForAccountFields will be used to display the data.
var iterator = 0;
var keys = Object.keys(result.data); //store the keys.
Object.keys(result.data).forEach(fieldToBeAddedAsAvailableOption => { //loop over the returned data.
//Identify the object of the field and add it to respective variable so that it can be displayed to the user
if (result.data[keys[iterator]] == 'account') {
this.availableOptionsForAccountFields.push(fieldToBeAddedAsAvailableOption);
}
iterator = iterator+1;
});
//After execution of this loop, the variable availableOptionsForAccountFields will have all the values to be displayed in dual listbox.
After extracting the data, I am left with the following data:
["{label=Created By ID, value=Contact_ID__r.CreatedById}"]
I need to convert this data into the following format so that I can display it using HTML:
[{"label":"Start Date", "value":"Contract_Start_Date__c"}]

JavaScript - Coverting invalid object into json object

I am currently making an ajax call to return data from an API. The return value is an object of an array. This format is an invalid object so I am having issues accessing the data that is being returned to me.
How can I convert this object into a valid json object so I can access the data that is being returned?
Here is an example of the data being returned:
data = { ["<p>Retail Websites has a profit value of $243,291. In the year 2020 we have seen a growth rate of about 2.3% </p>" ] }
I've tried using dataType: json in my ajax call but the result value is still the same.
Here is my ajax call using "dataType: json" :
$.ajax({
type: "POST",
url: dataUrl,
data: {
"retailId": retailId,
},
dataType: "json",
async: true,
error: function () {
console.log("error")
}
}).done(function (data) {
console.log("retail data", data)
})
I am unable to access the data in this object. I am expecting to be able to access the data like a json object such as : data[0]. I am stuck on how to accomplish this.

If your data is set as:
var data = { ["<p>Retail Websites has a profit value of $243,291. In the year 2020 we have seen a growth rate of about 2.3% </p>" ] }
Then the problem is the curly braces with no key. When you remove them, the array is correct. data[0] is equal to the string you expect.
If the result of your API call is the whole of data = {...} and you know that it is, then you can capture the string, remove the characters at the beginning and end that don't belong (everything outside the square brackets) and use JSON.parse to get your JSON data. There are several ways to remove the characters. If the text is always the case, you can use substrings, or if you need to be more flexible, you can use regular expressions.

Split a multidimensional javascript array

I have an array that looks something like this
[[1,2,3],[1,2,3]]
Because of the way it is being received (via ajax) it is being read as a string instead of an array
using .split(',') doesn't work here.
console.log shows it as [[1,2,3],[1,2,3]] so I know the data is going through, however if I were to put the array directly in the page it shows properly as array array
This is the ajax with the recommendation given below. It still comes as plaintext.
$.ajax({
url: "file.php" + "?param=" + param,
type: "POST",
data: 'data',
datatype: 'json',
success: function (data) {
object = JSON.parse(data);
filters();
}
})

Use JSON.parse() to convert from string to array:
var arr = JSON.parse('[[1,2,3],[1,2,3]]')
console.log(arr[0])

You can convert it to a multidimensional array by parsing it as a JSON string:
var parsedArray = JSON.parse(yourString);

parsing json data without a comma separator

My JSON is like below
{"_id":707860,"name":"Hurzuf","country":"UA","coord":{"lon":34.283333,"lat":44.549999}}
{"_id":519188,"name":"Novinki","country":"RU","coord":{"lon":37.666668,"lat":55.683334}}
{"_id":1283378,"name":"Gorkhā","country":"NP","coord":{"lon":84.633331,"lat":28}}
{"_id":1270260,"name":"State of Haryāna","country":"IN","coord":{"lon":76,"lat":29}}
{"_id":708546,"name":"Holubynka","country":"UA","coord":{"lon":33.900002,"lat":44.599998}}
It is a JSON without comma separation, how to read this file? I tried to parse the JSON and add commas in between, but couldn't do that either.
myapp.controller('Ctrl', ['$scope', '$http', function($scope, $http) {
$http.get('todos.json').success(function(data) {
var nuarr = data.toString().split("\n");
for(i in nuarr) {
myjson.push(i+",");
}
});
}]);

This format is typically called "newline-delimited JSON" or "ndjson"; there are several modules that can parse this, but if you're data set is small and you can do it all at once, you're on the right track:
var ndjson = "..." // assuming your data is already loaded in as a string
var records = ndjson.split('\n').map(function (record) {
return JSON.parse(record)
})
That simplifies it a bit, but then you have all of your records in an array, as parsed JSON objects. What you do to them after that is up to you, but the key takeaway here is that your JSON is a list of objects, not a single object: you don't want to parse it as a whole, but as individual records.
Say then, you want to create an object whose keys are the individual IDs; that might be helpful:
var recordHash = {}
records.forEach(function (record) {
recordHash[record._id] = record
})
Now you can address the individual records as recordHash['12345678'] assuming that 12345678 is the id of the record you wanted. You'll want to mutate the records into whatever data structure makes sense for your application, so it really depends on what you're looking for, but that example might get you started.
I really don't recommend trying to mutate the data that you're receiving into some other format before parsing; it's fragile. You'll find it much safer and more re-usable to parse out the data in the way you were provided it, and then transform it into whatever data structure makes sense for your application.

$http.get expects that response must be json. You can write your own custom response transformer to do that so.
$http({
url: 'todos.json',
method: 'GET',
transformResponse: function (data) {
return data.split('\n').map(function(line) {
return JSON.parse(line);
});
}
}).success(function (response) {
console.log(response);
// do whatever you want to do
// response will be of type array of objects
});

Your JSON needs to be a single object or array. Just joining a bunch of objects together with a comma does not define a single JSON object. Try this instead to get a parsable array of objects:
var nuarr = data.toString().split("\n");
myjson = '[' + nuarr.join(',') + ']';
Then JSON.parse(myjson) should return an array of objects. Alternatively, you can just map each element of nuarr to it's JSON-parsed value and collect the results in another array.

$http.get expects that response must be json. You can write your own custom response transformer to do that so.
$http({
url: 'todos.json',
method: 'GET',
transformResponse: function (data) {
return data.split('\n').map(function(line) {
return JSON.parse(line);
});
}
}).success(function (response) {
console.log(response);
// do whatever you want to do
// response will be of type array of objects
});

var myJson = nuarr.join(',');
But what are you really trying to do? Your code is pushing the strings with a comma added into an array, so end up with
["{...},", "{...},", ...]

As I see it, You have a collection of json objects, with the delimiter as newline.
Try this:
myapp.controller('Ctrl', ['$scope', '$http', function($scope, $http) {
$http.get('todos.json').success(function(data) {
myjson = data.split("\n").map(function(line) { return JSON.parse(line); });
});
}]);

Use a regexp to split into lines, then map each line into its JSON-parsed equivalent, yielding an array of the objects on each line:
input . match(/^.*$/gm) . map(JSON.parse)
Or use split as other answers suggest:
input . split('\n') . map(JSON.parse)

As stupid as it may seem, we got tired of using commas and quotes with JSON, along with not having comments or multiline strings.
Knowing that Douglas Crockford and his disciples would cry 'Blasphemy', we proceeded to write a specification, parser, and formatter for our own Relaxed Json syntax.
The fact is you don't really need commas, and quotes are only needed in a few exceptional cases. And you don't need newlines either.
With Relaxed Json, to make your example work, you would just put '[' and ']' around what you already have and call
val realJson = parser.stringToJson(...)
But you don't need newlines between the array values.
And you can also remove all the commas in-between your key-values.
And you don't need quotes around your keys.
So you could do this:
[
{ _id:707860 name:Hurzuf country:UA
coord:{lon:34.283333 lat:44.549999}
}
{ _id:519188 name:Novinki country:RU
coord:{lon:37.666668 lat:55.683334}
}
]
Link To Specification:
http://www.relaxedjson.org
Link To NPM
https://www.npmjs.com/package/really-relaxed-json
Paste the example here to see how easy it is to parse:
http://www.relaxedjson.org/docs/converter.html

Update 2022
#milkandtang answer put me on the right path but JSON.parse() gave me trouble and returned errors even after splitting the lines. It keeps complaining about lines being empty or malformated.
This is what works for me with New-Line Delimited JSON
var ndjson = data;//must be a string
//declare variable that will be array of json
var json = [];
//split
ndjson.split('\n').map(function (record) {
//regex to format each array to a json object
var array = JSON.parse(`[${record.replace(/\}\n\{/g, '},{')}]`);
//push to json array
json.push(array);
})
//pheeew...
console.log(json);

How to cast JSON array values as integers in javascript (from php / mysql)

I have a php page which gets some data in mysql database and return a json file, and then I call this json file with an ajax call :
$.ajax({
type: "POST",
dataType: "json",
url: "get_players_stats.php", //Relative or absolute path to players_stats file
success: function(data) {
var list = [];
$.each(data, function() {
list.push([this.time, this.playersonline]);
})
console.log(list);
}
});
the console.log(list); shows me this :
[["-1009843200000", "1"], ["-252460800000", "2"], ["-94694400000", "3"], ["31536000000", "2"],....
but instead I want it to look like this :
[[-1009843200000, 1], [-252460800000, 2], [-94694400000, 3], [31536000000, 2],....
How can I do that ?

Could you just do something as simple as this?
$.each(data, function() {
list.push([Number(this.time), Number(this.playersonline)]);
}

Do you really need to convert those values to numeric ones? JavaScript only supports 53 bit integers, so parseInt('10765432100123456789') will be converted to 10765432100123458000 integer.
Working with large integers in JavaScript.
If you still would like to convert the response you can do something like this:
$.each(data, function() {
list.push([+this.time, +this.playersonline]);
})

This is a type conversion problem: your data is showing as text format and you want it as number format.
You could parse the text as float in javascript, but that would likely be very inefficient, when instead you could cast the data as the type you need in the SQL query that returns the JSON.
To get you more details on how, it would be good to see how you pull the data into the JSON in the first place.
EDIT:
the actual answer you should be using is here:
PHP json_encode encoding numbers as strings

ES6 syntax
http://jsbin.com/qamoru/edit?js,console
let arr=[["-1009843200000", "1"], ["-252460800000", "2"], ["-94694400000", "3"], ["31536000000", "2"]];
let newArr = arr.map((item)=> item.map((it)=> Number(it)));
console.log(newArr)
JS Bin on jsbin.com