Guide to iterating through an array of objects and calculating the total value of a particular property using Javascript

Question

Guide to iterating through an array of objects and calculating the total value of a particular property using Javascript

Given an array of objects containing battle information for Maria and Cristiano, the task is to scroll through them and add up their battlesWon count. Finally, display how many battles each one won as demonstrated in the example.

 const arrayOfBattles = [
      {
        id: '147acaa3-363c-4a28-af43-fcc035a1d500',
        arena: 'Philippine Arena',
        firstParticipant: {
          address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
          name: 'Cristiano',
          battlesWon: 0
        },
        secondParticipant: {
          address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
          name: 'Maria',
          battlesWon: 1
        },
        logs: [ [Object] ]
      },
      {
        id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
        arena: 'Greensboro Coliseum',
        firstParticipant: {
          address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
          name: 'Maria',
          battlesWon: 1
        },
        secondParticipant: {
          address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
          name: 'Cristiano',
          battlesWon: 0
        },
        logs: [ [Object] ]
      }
    ]

Expected Output:

{
  Cristiano: 0,
  Maria: 2
}

javascript arrays

Answer 1

Answer №1

One effective approach could involve iterating through the array using the forEach method, then storing the values in a results dictionary. This can be seen below:

let list = [
    {
        id: '147acaa3-363c-4a28-af43-fcc035a1d500',
        arena: 'Philippine Arena',
        firstParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
            name: 'Cristiano',
            battlesWon: 0
        },
        secondParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
            name: 'Maria',
            battlesWon: 1
        },
        logs: [[Object]]
    },
    {
        id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
        arena: 'Greensboro Coliseum',
        firstParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
            name: 'Maria',
            battlesWon: 1
        },
        secondParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
            name: 'Cristiano',
            battlesWon: 0
        },
        logs: [[Object]]
    }
]

let results = {
    Cristiano: 0,
    Maria: 0
}

list.forEach(arena => {
    results[arena.firstParticipant.name] += arena.firstParticipant.battlesWon
    results[arena.secondParticipant.name] += arena.secondParticipant.battlesWon
})

console.log(results)

Answer 2

One effective approach could involve iterating through the array using the forEach method, then storing the values in a results dictionary. This can be seen below:

let list = [
    {
        id: '147acaa3-363c-4a28-af43-fcc035a1d500',
        arena: 'Philippine Arena',
        firstParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
            name: 'Cristiano',
            battlesWon: 0
        },
        secondParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
            name: 'Maria',
            battlesWon: 1
        },
        logs: [[Object]]
    },
    {
        id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
        arena: 'Greensboro Coliseum',
        firstParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
            name: 'Maria',
            battlesWon: 1
        },
        secondParticipant: {
            address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
            name: 'Cristiano',
            battlesWon: 0
        },
        logs: [[Object]]
    }
]

let results = {
    Cristiano: 0,
    Maria: 0
}

list.forEach(arena => {
    results[arena.firstParticipant.name] += arena.firstParticipant.battlesWon
    results[arena.secondParticipant.name] += arena.secondParticipant.battlesWon
})

console.log(results)

Answer 3

Answer №2

Utilizing Array.prototype.reduce enables you to iterate through each entry in the dataset and store participant data in the accumulator. This approach eliminates the need for creating an external object outside of your function.

Within each iteration of the reduce() method, a generic function is utilized to input participant data into the accumulator:

function handleParticipant(participant, acc) {
  const { name, battlesWon } = participant;
  acc[name] = (acc[name] || 0) + battlesWon;
}

The key logic lies in the line

acc[name] = (acc[name] || 0) + battlesWon

, which essentially means: if the given name exists in the dictionary, then add the value of battlesWon to it; otherwise, start with a base value of 0 and then add battlesWon.

Below is a proof-of-concept example:

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    }
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    }
  }
];

function handleParticipant(participant, acc) {
  const { name, battlesWon } = participant;
  acc[name] = (acc[name] || 0) + battlesWon;
}

const battlesWonByName = data.reduce((acc, cur) => {
  const { firstParticipant, secondParticipant } = cur;
  
  handleParticipant(firstParticipant, acc);
  handleParticipant(secondParticipant, acc);
  
  return acc;
}, {});

console.log(battlesWonByName);

Answer 4

Utilizing Array.prototype.reduce enables you to iterate through each entry in the dataset and store participant data in the accumulator. This approach eliminates the need for creating an external object outside of your function.

Within each iteration of the reduce() method, a generic function is utilized to input participant data into the accumulator:

function handleParticipant(participant, acc) {
  const { name, battlesWon } = participant;
  acc[name] = (acc[name] || 0) + battlesWon;
}

The key logic lies in the line

acc[name] = (acc[name] || 0) + battlesWon

, which essentially means: if the given name exists in the dictionary, then add the value of battlesWon to it; otherwise, start with a base value of 0 and then add battlesWon.

Below is a proof-of-concept example:

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    }
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    }
  }
];

function handleParticipant(participant, acc) {
  const { name, battlesWon } = participant;
  acc[name] = (acc[name] || 0) + battlesWon;
}

const battlesWonByName = data.reduce((acc, cur) => {
  const { firstParticipant, secondParticipant } = cur;
  
  handleParticipant(firstParticipant, acc);
  handleParticipant(secondParticipant, acc);
  
  return acc;
}, {});

console.log(battlesWonByName);

Answer 5

Answer №3

Please proceed with the following code snippet.

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    logs: [ [Object] ]
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    logs: [ [Object] ]
  }
]

let resultData = {};

data.forEach(element => {
  ['firstParticipant', 'secondParticipant'].forEach(property => {
    if(resultData.hasOwnProperty(element[property]['name'])) {
      resultData[element[property]['name']] += element[property]['battlesWon'];
    } else {
      resultData[element[property]['name']] = element[property]['battlesWon'];
    }
  })
})

console.log(resultData);

Answer 6

Please proceed with the following code snippet.

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    logs: [ [Object] ]
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    logs: [ [Object] ]
  }
]

let resultData = {};

data.forEach(element => {
  ['firstParticipant', 'secondParticipant'].forEach(property => {
    if(resultData.hasOwnProperty(element[property]['name'])) {
      resultData[element[property]['name']] += element[property]['battlesWon'];
    } else {
      resultData[element[property]['name']] = element[property]['battlesWon'];
    }
  })
})

console.log(resultData);

Answer 7

Answer №4

Below is a way to achieve this:

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    logs: [ [Object] ]
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    logs: [ [Object] ]
  }
]

var updatedData = new Array();
data.map((battle) => {
    updatedData[battle.firstParticipant.name] = updatedData[battle.firstParticipant.name] != null ? battle.firstParticipant.battlesWon + updatedData[battle.firstParticipant.name] :  battle.firstParticipant.battlesWon;
    updatedData[battle.secondParticipant.name] = updatedData[battle.secondParticipant.name] != null ? battle.secondParticipant.battlesWon + updatedData[battle.secondParticipant.name] :  battle.secondParticipant.battlesWon;
});

Answer 8

Below is a way to achieve this:

const data = [
  {
    id: '147acaa3-363c-4a28-af43-fcc035a1d500',
    arena: 'Philippine Arena',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    logs: [ [Object] ]
  },
  {
    id: 'b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab',
    arena: 'Greensboro Coliseum',
    firstParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644',
      name: 'Maria',
      battlesWon: 1
    },
    secondParticipant: {
      address: '0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661',
      name: 'Cristiano',
      battlesWon: 0
    },
    logs: [ [Object] ]
  }
]

var updatedData = new Array();
data.map((battle) => {
    updatedData[battle.firstParticipant.name] = updatedData[battle.firstParticipant.name] != null ? battle.firstParticipant.battlesWon + updatedData[battle.firstParticipant.name] :  battle.firstParticipant.battlesWon;
    updatedData[battle.secondParticipant.name] = updatedData[battle.secondParticipant.name] != null ? battle.secondParticipant.battlesWon + updatedData[battle.secondParticipant.name] :  battle.secondParticipant.battlesWon;
});

Answer 9

Answer №5

One effective way to achieve the desired outcome is by utilizing the reduce function

arr.reduce((acc, curr) => {
  const { firstParticipant: { name: a, battlesWon: m }, secondParticipant: { name: b, battlesWon: n } } = curr;
  acc[a] = (acc[a] ?? 0) + m
  acc[b] = (acc[b] ?? 0) + n
  return acc;
}, {});

1)

const arr = [
  {
    id: "147acaa3-363c-4a28-af43-fcc035a1d500",
    arena: "Philippine Arena",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    logs: [[Object]],
  },
  {
    id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
    arena: "Greensboro Coliseum",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    logs: [[Object]],
  },
];

const result = arr.reduce((acc, curr) => {
  const {
    firstParticipant: { name: name1, battlesWon: battlesWon1 },
    secondParticipant: { name: name2, battlesWon: battlesWon2 },
  } = curr;

  acc[name1] ? (acc[name1] += battlesWon1) : (acc[name1] = battlesWon1);
  acc[name2] ? (acc[name2] += battlesWon2) : (acc[name2] = battlesWon2);

  return acc;
}, {});

console.log(result);

2)

const arr = [
  {
    id: "147acaa3-363c-4a28-af43-fcc035a1d500",
    arena: "Philippine Arena",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    logs: [[Object]],
  },
  {
    id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
    arena: "Greensboro Coliseum",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    logs: [[Object]],
  },
];

const result = arr.reduce((acc, { firstParticipant, secondParticipant }) => {
  acc[firstParticipant.name]
    ? (acc[firstParticipant.name] += firstParticipant.battlesWon)
    : (acc[firstParticipant.name] = firstParticipant.battlesWon);

  acc[secondParticipant.name]
    ? (acc[secondParticipant.name] += secondParticipant.battlesWon)
    : (acc[secondParticipant.name] = secondParticipant.battlesWon);
  return acc;
}, {});

console.log(result);

Answer 10

One effective way to achieve the desired outcome is by utilizing the reduce function

arr.reduce((acc, curr) => {
  const { firstParticipant: { name: a, battlesWon: m }, secondParticipant: { name: b, battlesWon: n } } = curr;
  acc[a] = (acc[a] ?? 0) + m
  acc[b] = (acc[b] ?? 0) + n
  return acc;
}, {});

1)

const arr = [
  {
    id: "147acaa3-363c-4a28-af43-fcc035a1d500",
    arena: "Philippine Arena",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    logs: [[Object]],
  },
  {
    id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
    arena: "Greensboro Coliseum",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    logs: [[Object]],
  },
];

const result = arr.reduce((acc, curr) => {
  const {
    firstParticipant: { name: name1, battlesWon: battlesWon1 },
    secondParticipant: { name: name2, battlesWon: battlesWon2 },
  } = curr;

  acc[name1] ? (acc[name1] += battlesWon1) : (acc[name1] = battlesWon1);
  acc[name2] ? (acc[name2] += battlesWon2) : (acc[name2] = battlesWon2);

  return acc;
}, {});

console.log(result);

2)

const arr = [
  {
    id: "147acaa3-363c-4a28-af43-fcc035a1d500",
    arena: "Philippine Arena",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    logs: [[Object]],
  },
  {
    id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
    arena: "Greensboro Coliseum",
    firstParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
      name: "Maria",
      battlesWon: 1,
    },
    secondParticipant: {
      address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
      name: "Cristiano",
      battlesWon: 0,
    },
    logs: [[Object]],
  },
];

const result = arr.reduce((acc, { firstParticipant, secondParticipant }) => {
  acc[firstParticipant.name]
    ? (acc[firstParticipant.name] += firstParticipant.battlesWon)
    : (acc[firstParticipant.name] = firstParticipant.battlesWon);

  acc[secondParticipant.name]
    ? (acc[secondParticipant.name] += secondParticipant.battlesWon)
    : (acc[secondParticipant.name] = secondParticipant.battlesWon);
  return acc;
}, {});

console.log(result);

Answer 11

Answer №6

If you're working with nodeJs and need to verify an additional 'Johnn', this code snippet will come in handy.

This script uses lodash library to iterate through an array of objects containing participant data from different arenas.

import lodash  from 'lodash';
const participants = [
    {
        id: "147acaa3-363c-4a28-af43-fcc035a1d500",
        arena: "Philippine Arena",
        firstParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
            name: "Cristiano",
            battlesWon: 0,
        },
        secondParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
            name: "Maria",
            battlesWon: 1,
        },
        logs: [[Object]],
    },
    {
        id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
        arena: "Greensboro Coliseum",
        firstParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
            name: "John",
            battlesWon: 1,
        },
        secondParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
            name: "Cristiano",
            battlesWon: 0,
        },
        logs: [[Object]],
    },
];

const searchTerms = ['Cristiano', 'Maria', 'John'];
const attributesToSum = [{
    selector: 'firstParticipant.name',
    sum: 'firstParticipant.battlesWon'
},{
    selector: 'secondParticipant.name',
    sum: 'secondParticipant.battlesWon'
}];

function calculateTotalWins(participants, attributesToSum, searchTerms) {
    let result = {};
    participants.forEach((participantData) => {
        attributesToSum.forEach((attribute)=>{
            let index = searchTerms.indexOf(lodash.get(participantData, attribute.selector));
            let value = lodash.get(participantData, attribute.sum);
            if( index > -1) {
                result[searchTerms[index]] = result[searchTerms[index]] ? (result[searchTerms[index]] + value) : value;
            }
        });
    });
    return result;
}
console.log(calculateTotalWins(participants, attributesToSum, searchTerms));

Answer 12

If you're working with nodeJs and need to verify an additional 'Johnn', this code snippet will come in handy.

This script uses lodash library to iterate through an array of objects containing participant data from different arenas.

import lodash  from 'lodash';
const participants = [
    {
        id: "147acaa3-363c-4a28-af43-fcc035a1d500",
        arena: "Philippine Arena",
        firstParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
            name: "Cristiano",
            battlesWon: 0,
        },
        secondParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
            name: "Maria",
            battlesWon: 1,
        },
        logs: [[Object]],
    },
    {
        id: "b2ef2d28-d84d-4cc9-946f-3d57b8ce05ab",
        arena: "Greensboro Coliseum",
        firstParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075644",
            name: "John",
            battlesWon: 1,
        },
        secondParticipant: {
            address: "0x3ba59bcc1a02cb46e7de35fb0bacc860bf075661",
            name: "Cristiano",
            battlesWon: 0,
        },
        logs: [[Object]],
    },
];

const searchTerms = ['Cristiano', 'Maria', 'John'];
const attributesToSum = [{
    selector: 'firstParticipant.name',
    sum: 'firstParticipant.battlesWon'
},{
    selector: 'secondParticipant.name',
    sum: 'secondParticipant.battlesWon'
}];

function calculateTotalWins(participants, attributesToSum, searchTerms) {
    let result = {};
    participants.forEach((participantData) => {
        attributesToSum.forEach((attribute)=>{
            let index = searchTerms.indexOf(lodash.get(participantData, attribute.selector));
            let value = lodash.get(participantData, attribute.sum);
            if( index > -1) {
                result[searchTerms[index]] = result[searchTerms[index]] ? (result[searchTerms[index]] + value) : value;
            }
        });
    });
    return result;
}
console.log(calculateTotalWins(participants, attributesToSum, searchTerms));

Guide to iterating through an array of objects and calculating the total value of a particular property using Javascript

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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