CODEWITHSUNDEEP
javascriptarraysstringtype-conversion
Zhihar
Zhihar

Reputation: 1428

Javascript: Convert string to array of objects?

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?

Upvotes: 0

Views: 173

Answers (5)

dfsq
dfsq

Reputation: 193301

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)

Upvotes: 2

Wilson
Wilson

Reputation: 329

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);

Upvotes: 0

Ankit Agarwal
Ankit Agarwal

Reputation: 30737

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);

Upvotes: 0

Mihai Alexandru-Ionut
Mihai Alexandru-Ionut

Reputation: 48437

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);

Upvotes: 1

Mohammad Usman
Mohammad Usman

Reputation: 39392

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; }

Upvotes: 5

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