divide a single item into several items depending on its attribute

data = {1-inputWidth : '30px' , 1-inputHeight: '30px', 1-color : 'red',
        2-inputWidth : '20px' , 2-inputHeight: '10px', 2-color : 'blue',
        3-inputWidth : '60px' , 3-inputHeight: '70px', 3-color : 'white',  
        4-inputWidth : '90px' , 4-inputHeight: '10px', 4-color :'yellow', 
        scroll : 'auto', z-index : 1}

newData = {1: {1-inputWidth : '30px' , 1-inputHeight: '30px', 1-color : 'red'},
             2: { 2-inputWidth : '20px' , 2-inputHeight: '10px', 2-color : 'blue'}, 
             3: {3-inputWidth : '60px' , 3-inputHeight: '70px', 3-color : 'white'},  
             4: {4-inputWidth : '90px' , 4-inputHeight: '10px', 4-color :'yellow'}}

This object has keys starting with numbers and some that don't. I want to remove the non-numeric keys like scroll and z-index, and create a nested object using only the numeric keys from the original data. Can anyone help me figure this out? Thank you!

javascript

Answer №1

To identify keys that start with a number in your object, you can utilize Object.entries to iterate through each key and apply a regex check. If a key starts with a number, you can add it to the corresponding subobject:

let myObj = {'1-inputWidth' : '30px' , '1-inputHeight': '30px', '1-color' : 'red','2-inputWidth' : '20px' , '2-inputHeight': '10px', '2-color' : 'blue','3-inputWidth' : '60px' , '3-inputHeight': '70px', '3-color' : 'white',  '4-inputWidth' : '90px' , '4-inputHeight': '10px', '4-color' :'yellow', scroll : 'auto', 'z-index' : 1}

let o = Object.entries(myObj)
       .reduce((obj, [k, v]) => {
          let num = k.match(/^\d+/)              // extract number from key
          if (num) {                             // check for match
              if (obj[num]) obj[num][k] = v      // add new entry
              else obj[num] = {[k]: v}
          }
          return obj

       }, {})

console.log(o)

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