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?

Answer 1

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; } 

Answer 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) 

Answer 3

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); 

Answer 4

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); 

Answer 5

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);