CODEWITHSUNDEEP
javascriptarrayssorting
Rishikesh Dehariya
Rishikesh Dehariya

Reputation: 99

Sorting an array of objects in ascending order based on two keys having different datatypes

I want to sort an array in ascending order based on two properties.

I have following data array which looks like

[
  {
    id: 1,
    name: 'ABP',
    code: 1460,
    subCode: '0010'
  },
  {
    id: 2,
    name: 'GKY',
    code: 1460,
    subCode: '0030'
  },
  {
    id: 3,
    name: 'CPT',
    code: 1410,
    subCode: '0070'
  },
  {
    id: 4,
    name: 'KLB',
    code: 1470,
    subCode: '0050'
  },
  {
    id: 5,
    name: 'POL',
    code: 1430,
    subCode: '0050'
  },
  {
    id: 6,
    name: 'FVB',
    code: 1410,
    subCode: '0050'
  },
]

I want to sort it like

[
  {
    id: 6,
    name: 'FVB',
    code: 1410,
    subCode: '0050'
  },
  {
    id: 3,
    name: 'CPT',
    code: 1410,
    subCode: '0070'
  },
  {
    id: 5,
    name: 'POL',
    code: 1430,
    subCode: '0050'
  },
  {
    id: 1,
    name: 'ABP',
    code: 1460,
    subCode: '0010'
  },
  {
    id: 2,
    name: 'GKY',
    code: 1460,
    subCode: '0030'
  },
  {
    id: 4,
    name: 'KLB',
    code: 1470,
    subCode: '0050'
  },
]

I want to sort the array in ascending order based on code property and if same code exist for multiple items then I want to sort it based on subCode of the code property.

Problem I am facing here is, subCode is in string and code is in number. I have tried using array.sort and also by parsing subCode in integer but it has returned me different number which I didn't understand.

Upvotes: 0

Views: 82

Answers (2)

gkd
gkd

Reputation: 863

When you want to compare string value as number value (here is subCode), you will need to compare them by converting to number first

See below code.

Ary.sort(function (obj1, obj2) {
  if (obj1.code === obj2.code) {
    return Number(obj1.subCode) - Number(obj2.subCode)
  } else {
    return obj1.code - obj2.code
  }
})

I assume value of code will always be number.

Upvotes: 0

adiga
adiga

Reputation: 35222

You could subtract the the code properties inside the compareFunction. If both a and b have the same code property, then the || operator will subtract the subCode property. The - operator will coerce the strings to numbers and it will return a numeric value.

const input=[{id:1,name:"ABP",code:1460,subCode:"0010"},{id:2,name:"GKY",code:1460,subCode:"0030"},{id:3,name:"CPT",code:1410,subCode:"0070"},{id:4,name:"KLB",code:1470,subCode:"0050"},{id:5,name:"POL",code:1430,subCode:"0050"},{id:6,name:"FVB",code:1410,subCode:"0050"},];

input.sort((a, b) => a.code - b.code || a.subCode - b.subCode)

console.log(input)

Upvotes: 3

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