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Javascript Convert 'List()' to list [closed]

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I received data from another API. But I don't know how to convert and use data.
data example
{
...
answer:'List(value1,value2,value3,value4)',
...
}
I want to iterate all answer nodes. please help.

Approach
You could capture the group between List(...) and split that by comma ,
Regex test: https://regex101.com/r/xFf39R/1
const answer = 'List(value1,value2,value3,value4)'
const res = /List\((.*)\)/.exec(answer)[1].split(',')
console.log(res)
Reference
RegExp.prototype.exec()
Return value
[...] The returned array has the matched text as the first item, and then one item for each parenthetical capture group of the matched text.

Reading your data example... It seems like the answer is carrying a String as the single quote is presented in your data example.
answer:'List(value1,value2,value3,value4)'
^ ^
And the List(value1,value2,value3,value4) actually looks like some python List in system print.
Well, but this does not help in your direct question.
Assuming your want to get all four values into an array in javascript, do the followings
let data_example = {
...
'answer':'List(value1,value2,value3,value4)',
...
}
let answer_string = data_example['answer'].slice(5,-1)
let your_list = answer_string.split(',')
console.log(your_list)
//["value1","value2","value3","value4"]
But be careful... I assume your List() always start with 'List(' and end with ')'
See more on slice and split

Convert array values into strings in javascript [closed]

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I have this array [ABC, QWE, XYZ]
I would like to turn it into ['ABC', 'QWE', 'XYZ']
When I try to manipulate values in the current array I get: ReferenceError: ABC is not defined
Any ideas on how should I do it?
Thanks!

Convert arrays element types:
Number to strings
var strArr = [1,2,3,4,5].map(String);
// Result: ["1","2","3","4","5"]

We can't do that directly but after little bit change you can do that...
So the current array you said like array [ABC, QWE, XYZ],
Lets design you keys in object first:
var obj = {
ABC:1, QWE:'somevalue', XYZ:new Date()
}
So I created object obj having your variables lets say the three variables, now lets convert:
var arr = [];
for (var key in obj){
console.log(key, obj[key]);
arr.push(String(key));
}
console.log(arr);// you will see the desire result.
Running example here : example

Proper array structure [closed]

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Commonly, arrays are formed like var array = ["some","string","elements"] or var array = [1, 2, 3]. Been searching for times, but I haven't seen articles that may clear my mind. Now, is it possible to have an array structure like var array = [some, string, elements]. As what can be observed, it was somehow a string without "".
To visualize my concern, I have this code
var data = []
for (var x = 0; x < arrayData.length; x++){ //arrData contains [1,2] structure
data.push("$scope.item["arrayData[x]"]");
}
//which gives var data = ["$scope.item[1], $scope.item[2]"]
I needed that var data to form like var data = [$scope.item[1],$scope.item[2]]. Is it possible?
EDIT
My bad, I haven't explained my query fully. The "$scope.item[" is a string, that's why I encapsulated it to ""
EDIT II
Is it possible to have an array structure like var array = [some, string, here]. Consider that some,string and here are not variables.

Don't complecate it, Just go with using JSON.stringify();
Your code should be
data.push(JSON.stringify("$scope.item[" + arrayData[x] + "]"));

You cannot have an array structure like var array = [some, string, elements]. There should be variables named some, string and elements.
$scope is a special variable in AngularJS. So, you should use it without "s. For example:
data.push($scope.item[arrayData[x]]);

Deduplicate across strings maintaining identity label [closed]

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JavaScript problem. Can this be done?
I have an input array containing anything between 2 - 5 strings, each with a semi-colon delimited label to identify it. I need to de-duplicate such that the output removes the duplicates but also maintains the string identifiers, grouping if necessary.
Input Array (3 elements)
string1;apple|string2;orange|string3;orange
Output Array (now 2 elements since 'orange' appeared twice)
string1;apple|string2/string3;orange

I don't mind helping people that are just starting with a new programming language or programming: (also a js fiddle)
var arr=["string1;apple","string2;orange","string3;orange"];
var finalArr= [];
var output = {};
for(var i in arr){
var keyVal = arr[i].split(";");
if(output[keyVal[1]]==undefined){
output[keyVal[1]] = [keyVal[0]]
} else {
//should be an array
output[keyVal[1]].push(keyVal[0]);
}
}
for( var i in output){
finalArr.push(output[i].join("/")+";"+i);
}
console.log(finalArr);

I think your best option for this would be to find a way to logically group this information.
Convert the pipe-delimited string into an array.
Iterate through the array
Assign each id/value pair to a property=value pair in a struct.
Strip out the id and delimiter so you're left with the string itself in the array.
Sort the array.
Deduplicate the array.
Iterate through the array.
Iterate through the struct to generate a list of properties which values match the entry.
Unset the properties which values match the entry to reduce time in future iterations.
This is only one way of doing it. I've given you some hints on how you can approach the problem, but it's up to you to code this.

convert json object to javascript array [closed]

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After a mysql query, I used the json_encode to convert the result of the query and I'm getting the following:
[
{"id":"1","map_id":"1","description":"This is Athens","lat":"37.77994127700315","lng":"23.665237426757812","title":"Athens"},
{"id":"2","map_id":"1","description":"This is Rome","lat":"41.9100711","lng":"12.5359979","title":"Rome"}
]
I want to convert this to JavaScript array but getting only the values. For example:
myArray = [
[1, 1, 'This is Athens', 37.77994127700315,23.665237426757812, 'Athens']
[2, 1, 'This is Rome', 41.9100711, 12.5359979, 'Rome']
]
I tried many solutions I found here, but I didn't found any solution to give me exactly an array like myArray.

Assuming :
var a = [{"id":"1","map_id":"1","description":"This is Athens","lat":"37.77994127700315","lng":"23.665237426757812","title":"Athens"},{"id":"2","map_id":"1","description":"This is Rome","lat":"41.9100711","lng":"12.5359979","title":"Rome"}];
You can use Array.prototype.map():
var myArray = a.map(function(e){
return [e.id, e.map_id, e.description, e.lat, e.lng, e.title];
});
Result:
[
["1","1","This is Athens","37.77994127700315","23.665237426757812","Athens"],
["2","1","This is Rome","41.9100711","12.5359979","Rome"]
]