Javascript: Convert string to array of objects?

Question

Tell me, how can I optimally convert a string like

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407";

to an array like

const range = [
    {
        min: 1350,
        max: 1350,
    },
    {
        min: 1351,
        max: 1351,
    },
    {
        min: 1390,
        max: 1391,
    },
    {
        min: 1401,
        max: 1401,
    },
    {
        min: 1402,
        max: 1407,
    },
];

?

In other words, you need to create an array of number ranges using a string in which these numbers ranges are explicitly specified.

The most obvious of the possible algorithms is:

1) split the string using a delimiter,

2) the resulting parts are cleaned of spaces using the command trim

3) check whether the part is a number

4) if not, then split the part using the delimiter -

5) the parts obtained are cleaned of spaces using the command trim,

6) check that the amount of component eq 2 and it's a number

But is it possible to make it more optimal, more beautiful, more effective?

Zhihar, it's working for you ?

Mihai Alexandru-Ionut
– Mihai Alexandru-Ionut

2018-04-16 09:15:10 +00:00
Commented Apr 16, 2018 at 9:15 — Mihai Alexandru-Ionut
– Mihai Alexandru-Ionut, Commented Apr 16, 2018 at 9:15

Mohammad Usman · Accepted Answer · 2018-04-16 07:59:37Z

5

You can use .split() and .map():

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407";

const range = data.split(",").map(s => {
  let [min, max = min] = s.split("-");

  return {min: Number(min), max: Number(max)}
});

console.log(range);

.as-console-wrapper { max-height: 100% !important; top: 0; }

answered Apr 16, 2018 at 7:59

Mohammad Usman

39.6k20 gold badges99 silver badges101 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

dfsq · Accepted Answer · 2018-04-16 08:31:38Z

2

Try something like this:

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407"

const result = data
  .split(/\s*,\s*/)
  .map(pair => {
    const [min, max = min] = pair
      .split(/\s*-\s*/)
      .map(Number)

    return {
      min,
      max
    }
  })

console.log(result)

edited Apr 16, 2018 at 8:31

answered Apr 16, 2018 at 7:59

dfsq

193k26 gold badges244 silver badges261 bronze badges

2 Comments

Mihai Alexandru-Ionut Over a year ago

Don't forget to use + operator or Number constructor in order to force values to be numerical.

dfsq Over a year ago

@MihaiAlexandru-Ionut ah, right, didn't notice, thanks

Mihai Alexandru-Ionut · Accepted Answer · 2018-04-16 07:59:44Z

1

You can use split method in combination with reduce method.

The reduce() method applies a function against an accumulator and each element in the array (from left to right) to reduce it to a single value.

Also, use + operator in order to force result to Number.

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407";
const array = data.split(', ').reduce(function(arr, elem){
   var [min, max] = elem.split('-');
   arr.push({
      min : + min,
      max: + (max || min)
   });
   return arr;
},[]);
console.log(array);

answered Apr 16, 2018 at 7:59

Mihai Alexandru-Ionut

48.6k14 gold badges106 silver badges132 bronze badges

Comments

Ankit Agarwal · Accepted Answer · 2018-04-16 08:02:42Z

0

I think the simple and much understandable way would be to loop through the values and check if they have a range value (with hyphen) and create the object accordingly for the range array.

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407";
var range = [];
data.split(',').forEach((val)=>{
  var obj = {};
  if(val.indexOf('-') === -1 ){
    obj.min = val;
    obj.max = val;
  } else {
    obj.min = val.split('-')[0].trim();
    obj.max = val.split('-')[1].trim();
  }
  range.push(obj);
});

console.log(range);

answered Apr 16, 2018 at 8:02

Ankit Agarwal

30.8k5 gold badges41 silver badges63 bronze badges

Comments

Wilson · Accepted Answer · 2018-04-16 08:20:11Z

0

This code will help you.

const data = "1350, 1351, 1390-1391, 1401, 1402 - 1407";
var arr = data.split(',');
const range = [];
for(var i=0; i< arr.length; i++){
var b = arr[i].split('-');
if(!b[1])b[1]=b[0];
var obj = new Object();
obj.min = parseInt(b[0]);
obj.max = parseInt(b[1]);
range.push(obj);
}
console.log(range);

answered Apr 16, 2018 at 8:20

Wilson

3292 silver badges12 bronze badges

Collectives™ on Stack Overflow

Javascript: Convert string to array of objects?

5 Answers 5

Comments

2 Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

2 Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related