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How to use the sumBy function from lodash

Find comprehensive JavaScript lodash.sumBy code examples handpicked from public code repositorys.

lodash.sumBy is a function that iterates through an array of objects, applies a function to each element to retrieve a numeric value, and returns the sum of all those numeric values.

HostManager.js

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generateStats(stats) {
  const result = {}
  for (const metric in stats) {
    result[metric] = stats[metric]
    result['total' + metric[0].toUpperCase() + metric.slice(1) ] = _.sumBy(stats[metric], 1)
  }
  return result
}

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+ 12 other calls in file

lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

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module.exports.strContains         = _.strContains;
module.exports.stripTags           = _.stripTags;
module.exports.sub                 = _.sub;
module.exports.subtract            = _.subtract;
module.exports.sum                 = _.sum;
module.exports.sumBy               = _.sumBy;
module.exports.tail                = _.tail;
module.exports.take                = _.take;
module.exports.takeRight           = _.takeRight;
module.exports.takeRightWhile      = _.takeRightWhile;

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+ 92 other calls in file

How does lodash.sumBy work?

lodash.sumBy is a method in the Lodash library that takes a collection of objects and a function that returns a numeric value for each object, and returns the sum of those numeric values for all objects in the collection.

It first maps each object in the collection to a numeric value by applying the given function to each object, then calculates the sum of those numeric values using the lodash.sum function.

api.js

GitHub: shiddenme/defi-explorer

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  var address = privateKey.publicKey.toAddress();
  self.getUtxos({
    addresses: coin == 'bch' ? address.toLegacyAddress() : address.toString(),
  }, function(err, utxos) {
    if (err) return cb(err);
    return cb(null, _.sumBy(utxos, 'satoshis'));
  });
};


API.prototype.buildTxFromPrivateKey = function(privateKey, destinationAddress, opts, cb) {

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(subtract); // => 2


const sum = _.sum([4, 2, 8, 6]);
console.log(sum); // => 20


const sumBy = _.sumBy([{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }], o => o.n);
console.log(sumBy); // => 20




// Number

+ 15 other calls in file

Ai Example

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const _ = require("lodash");

const orders = [
  { product: "t-shirt", price: 15 },
  { product: "pants", price: 25 },
  { product: "socks", price: 5 },
];

const totalPrice = _.sumBy(orders, (order) => order.price);

console.log(totalPrice); // output: 45

In this example, lodash.sumBy is used to calculate the total price of all the orders in the orders array by summing the price property of each order object.

hakemus.js

GitHub: solita/livijuku-front

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$scope.sumHaettavaAvustus = function () {
  var avustuskohteet = _.flatten(_.map($scope.avustuskohdeluokat, function (l) {
    return l.avustuskohteet;
  }));
  return _.sumBy(avustuskohteet, _.partial(h.avustuskohdeRahamaara, 'haettavaavustus'));
};

$scope.sumHaettavaElyAvustus = function () {
  var maararahatarpeetSum =

+ 2 other calls in file

timerlist.js

GitHub: marc2016/TimeTracker2020

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  var currentJobs = _.filter(this.jobTimerList(), function(d) { 
    var docDate = moment(d.date())
    return momentValue.isSame(docDate, 'month')
  });

  var monthTimeSum = _.sumBy(currentJobs, function(o) { return o.elapsedSeconds(); });

  footer.overtimeSubject.next(monthTimeSum-(daysUntilToday*8*60*60))
}

+ 47 other calls in file

jobtable.js

GitHub: marc2016/TimeTracker2020

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responsive: true,
drawCallback: async function () {
    var api = this.api();
    var columns = api.columns( [1,5],  {"filter": "applied"} ).data()
    var zippedColumns = _.zipWith(columns[0], columns[1], (a,b) => {return {description: a, duration: b}})
    var sumTableHours = _.sumBy(zippedColumns, function(element){
        if (element.description == "Abwesend") {
            return 0;
        }
        var duration = element.duration

+ 15 other calls in file

wObjectHelper.js

GitHub: Waiviogit/waivio-api

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  !_.isEmpty(blacklist)
  && !_.isEmpty(field.active_votes)
 && field.name !== FIELDS_NAMES.AUTHORITY
) {
  field.active_votes = _.filter(field.active_votes, (o) => !_.includes(blacklist, o.voter));
  field.weight = 1 + _.sumBy(field.active_votes, (vote) => vote.weight);
}
let adminVote, administrativeVote, ownershipVote, ownerVote;
_.map(field.active_votes, (vote) => {
  vote.timestamp = vote._id.getTimestamp().valueOf();

+ 2 other calls in file

generateDraftBill.js

GitHub: fliflops/rata_backend

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const sumQtyHeader = ({data,field})=>{
    return parseFloat(_.sum(data.map(item => parseFloat(item[field])))).toFixed(2)
}


const sumBy = ({data,field}) => {
    return _.sumBy(data,item => parseFloat(item[field])).toFixed(2)
}


const getAggCondition = async(aggId)=>{
    try{

+ 17 other calls in file

fun.js

GitHub: nazmulhasan21/easy-mess-pro

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return await Promise.all(
  allUserMonthData.map(async (item, index) => {
    if (item.userId) {
      const data = await memberData(type, item.userId._id);

      const total = _.sumBy(data, 'amount');
      if (data.length > 0) {
        return {
          userId: item.userId._id,
          name: item.userId.name,

+ 11 other calls in file

list_helper.js

GitHub: rtapper1/fullstackopen2022

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const authorLikes = _(blogs)
  .groupBy('author')
  .map((author, authorName) => ({
    author: authorName,
    likes: _.sumBy(author, 'likes')
  }))
  .value()

return _.maxBy(authorLikes, (author) => author.likes)

monitoring.js

GitHub: Sakar-11/enbuild

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];
const expectedCost = _(combinedArray)
  .groupBy("activity")
  .map((combined, id) => ({
    activity: id,
    total: _.sumBy(combined, "total"),
  }))
  .value();
// console.log(expectedCost)

+ 219 other calls in file

SearchPage.js

GitHub: kyunghoon5/Full-Stack

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  search.map((item) => _.sumBy(item.fifth, 'qtyord'))
);
const totalItems9 = _.sumBy(
  search.map((item) => _.sumBy(item.fourth, 'qtyord'))
);
const totalItems10 = _.sumBy(
  search.map((item) => _.sumBy(item.third, 'qtyord'))
);
const totalItems11 = _.sumBy(
  search.map((item) => _.sumBy(item.second, 'qtyord'))

+ 174 other calls in file

salary.js

GitHub: dikshitthakral/erp-student

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    basicSalary,
    overTimeRatePerHr : isNaN(overTimeRatePerHr) ? 0 : overTimeRatePerHr,
    allowances: validateAllowanceAndDeductionsModel(allowances || []),
    deductions: validateAllowanceAndDeductionsModel(deductions || []),
};
salaryObj.allowances.length > 0 ? salaryObj['totalAllowance'] = sumBy(salaryObj.allowances, 'amount') : 0;
salaryObj.deductions.length > 0 ? salaryObj['totalDeductions'] = sumBy(salaryObj.deductions, 'amount') : 0;
salaryObj['netSalary'] = salaryObj['basicSalary'] + salaryObj['totalAllowance'] - salaryObj['totalDeductions'];

const newSalary = await salary.create(salaryObj);

+ 3 other calls in file

submit_resrc.js

GitHub: pratimagupta98/BlogApi

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  // return value+= value;
return value.meteors
 });
 
console.log("New Array",newarr1)
let ttl = _.sumBy([...newarr1]);
console.log("rTotal",ttl);
//console.log("getdatail",getdatail)
 
 let ttll  = ttl+10

+ 2 other calls in file

list_helper.js

GitHub: lhan17/Full-Stack-Open-2022

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const mostLikesBlogs = (blogs) => {
    const groupedBlogs = _.groupBy(blogs, 'author')
    const authorCounts = _.map(groupedBlogs, (blogs, author) => {
        return {
            author,
            count: _.sumBy(blogs, 'likes'),
        }
    })
    const sortedAuthorCounts = _.orderBy(authorCounts, 'count', 'desc')
    const mostProlificAuthor = sortedAuthorCounts[0]

+ 2 other calls in file

matchBotHelper.js

GitHub: Waiviogit/waivioCampaignsService

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  { users: { $elemMatch: { permlink: paymentData.reservationPermlink } } },
);
if (_.get(campaign, 'compensationAccount')) {
  await updateCompensationFee(paymentData, campaign, _.round(voteWeight / 2, 3));
}
const amount = _.sumBy(result, 'amount');
if (voteWeight >= amount) {
  voteWeight = amount;
  payed = true;
}

+ 5 other calls in file

list_helper.js

GitHub: magic-oreo/fullstackopen

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}


const mostLikes = (blogs) => {
  const most = _.maxBy(_(blogs).groupBy('author').map(group => ({
    author: group[0].author,
    likes: _.sumBy(group, 'likes')
  })).value(), 'likes')
  return blogs === undefined
    ? undefined
    : most

+ 2 other calls in file

sapi.js

GitHub: enriquesouza/NodeJsSmartCard

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let transaction = new smartCash.TransactionBuilder();

let listUnspent = await getUnspent(fromAddress);

let totalUnspent = _.sumBy(listUnspent, 'amount');

console.log(`Total Unspent ${totalUnspent}`)

let fee = calculateFee(listUnspent);

index.js

GitHub: pappukrs/nodash-lib

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// console.log(lodash.random(5, 1, true), "randomNumber");
// console.log(lodash.random(1.2), "randomCheckrd");


// var objects = [{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }];


// const sum = lodash.sumBy(objects, (o) => {
//   return o.n;
// });
// const sum = lodash.sumBy(objects, "n");
// console.log(sum, "sum");

+ 9 other calls in file

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