Change string into array

Question

I am beginner in Angular and TS.
I want to get array of integer like [1,2,3,4] , but jasper server gives an output as string "[1,2,3,4]".
So how I change it using Type Script.

Data :

[
    {  
       LABEL:'CR FAILURE MESSAGES',
       DATASET:'[3,3,10,15,21,35,35,81]'
    },
    {  
       LABEL:'CR SUCCESS MESSAGES',
       DATASET:'[1,4,31,34,63,78,219,312,1076]'
    },
    {  
       LABEL:'CR TOTAL MESSAGES',
       DATASET:'[4,7,55,66,93,98,300,312,1086]'
    },
    {  
       LABEL:'PR FAILURE MESSAGES',
       DATASET:'[2,5,6,12,18,19,23,48]'
    },
    {  
       LABEL:'PR SUCCESS MESSAGES',
       DATASET:'[4,5,10,22,32,65,101,139]'
    }
]

Ben · Accepted Answer · 2018-01-25 14:58:35Z

1

You can use JSON.parse to do this for you.

let obj = {
    "LABEL":"CR FAILURE MESSAGES",
    "DATASET":"[3,3,10,13,21,35,35,81]"
};

let datasetArray = JSON.parse(obj.DATASET); // Generates the array
console.log(datasetArray);

Is there a reason why you get an array wrapped in a string? If the server just returned a stringified JSON object, I would expect that calling JSON.parse on the whole thing would just build the array inline with the rest of the object.

answered Jan 25, 2018 at 14:58

Ben

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2 Comments

Jayantha Over a year ago

can you check agin

Ben Over a year ago

You should be able to extend the same approach over an array. Just call JSON.parse on every DATASET field.

Neji Soltani · Accepted Answer · 2018-01-25 10:48:00Z

1

Here's my solution

You can remove the first and the last characters to get "1,2,3,4" and then use split in order to turn it into array

The code is well commented take your time to understand it line by line;

var input = "[3,3,10,13,21,35,35,81]"
console.log(input)

//cleaning the input
var cinput = input.substr(1).slice(0, -1);
console.log(cinput)
//using split to turn it into an array by using the ',' as seperator
var output = cinput.split(',')
//the result
console.log(output)
var parsedarray = []

//to parse each array element to int
for (var i = 0, len = output.length; i < len; i++) {
  parsedarray[i] = parseInt(output[i]);
}
//parsed numbers inside the array
console.log(parsedarray)

answered Jan 25, 2018 at 10:48

Neji Soltani

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