Convert String into Array of Objects: JS

Question

I have the following string:

const str = "Tuba|203488|Music Theory|301071"

I would like to convert it to an array of objects like so:

[
{specialty: "Tuba",
userid:203488},
{specialty: "Music Theory",
userid:301071}
]

How can I do this in javascript?

Answer 1

You can split the string by the pipe and then iterate over the resultant array, incrementing by 2, adding and object to a final result array:

 const str = "Tuba|203488|Music Theory|301071" const result = []; const arr = str.split("|"); for (let i = 0; i < arr.length; i+=2) { result.push({ specialty: arr[i], userId: arr[i+1] }); } console.log(result);

Answer 2

You can do like this:

function createArrayFromString(str) {
  const strArray = str.split("|")
  let results = []

  for (let i=0; i<strArray.length; i+=2) {
    results.push(
      {
        speciality: strArray[i],
        userid: strArray[i+1]
      }
    )
  }
  return results
}

const str = "Tuba|203488|Music Theory|301071"
console.log(createArrayFromString(str))
// [
//   { speciality: 'Tuba', userid: '203488' },
//   { speciality: 'Music Theory', userid: '301071' }
// ]

Answer 3

Here is a solution making these assumptions:

• values in input string are separated by |
• values are in a set of two, the first one is the specialty (string value), the second one the userid (number value)
• result should be an array of objects of format: [{ specialty: String, userid: Number }]

The solution first splits the input string on | , then uses a .reduce() to build the resulting array of objects:

 const str = "Tuba|203488|Music Theory|301071"; let result = str.split('|').reduce((acc, val, idx, arr) => { if(idx % 2) { acc.push({ specialty: arr[idx - 1], userid: Number(val) }); } return acc; }, []); console.log(result);

Output:

[
  {
    "specialty": "Tuba",
    "userid": 203488
  },
  {
    "specialty": "Music Theory",
    "userid": 301071
  }
]

Answer 4

Here's how you can do it.

 const str = "Tuba|203488|Music Theory|301071"; const splitStringArray = str.split("|"); console.log("Split", splitStringArray); const finalObject = []; for (let index = 0; index < splitStringArray.length; index += 2) { finalObject.push({ Speciality: splitStringArray[index], UserId: splitStringArray[finalObject + 1], }); } console.log("Final Object", finalObject);